Number

160

160 is a composite number, even, a calendar year.

Abundant Number Evil Number Flippable Gapful Number Pernicious Number Practical Number Recamán's Sequence Semiperfect Number Year

Historical context — 160 AD

Calendar year

Year 160 (CLX) was a leap year starting on Monday of the Julian calendar.

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Historical context — 160 BC

Calendar year

Year 160 BC was a year of the pre-Julian Roman calendar.

Excerpt from Wikipedia (en) ↗ · Licensed CC BY-SA 4.0 · English fallback Read the full article on Wikipedia →

Year facts

Year type: Leap year
Divisible by 4 and not by 100; February has 29 days.
Days in year: 366
ISO weeks: 52
Started on: Tuesday
January 1, 160
Ended on: Wednesday
December 31, 160
Friday the 13ths: 1
One Friday the 13th this year.
Decade: 160s
160–169
Century: 2nd century
101–200
Millennium: 1st millennium
1–1000
Years ago: 1,866
1866 years before 2026.

In other calendars

Hebrew: 3920 / 3921 AM
Rosh Hashanah falls in September/October.
Chinese: Year of the zodiac:Metal zodiac:Rat
Sexagenary cycle position 37 of 60. Lunar new year falls in late January / mid-February.
Buddhist Era: 703 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
Ethiopian: 152 / 153 ET
Year boundary at Enkutatash (September 11/12).
Indian National (Saka): 82 / 81 Saka
Indian national calendar; year starts in March.

Properties

Parity: Even
Digit count: 3
Digit sum: 7
Digit product: 0
Digital root: 7
Palindrome: No
Bit width: 8 bits
Reversed: 61
Flips to (rotate 180°): 91
Recamán's sequence: a(92) = 160
Square (n²): 25,600
Cube (n³): 4,096,000
Divisor count: 12
σ(n) — sum of divisors: 378
φ(n) — Euler's totient: 64
Sum of prime factors: 15

Primality

Prime factorization: 2 ⁵ × 5

Nearest primes: 157 (−3) · 163 (+3)

Divisors & multiples

All divisors (12)

1 · 2 · 4 · 5 · 8 · 10 · 16 · 20 · 32 · 40 · 80 (half) · 160

Aliquot sum (sum of proper divisors): 218

Factor pairs (a × b = 160)

1 × 160

2 × 80

4 × 40

5 × 32

8 × 20

10 × 16

First multiples

160 · 320 (double) · 480 · 640 · 800 · 960 · 1,120 · 1,280 · 1,440 · 1,600

Sums & aliquot sequence

As a sum of two squares: 4² + 12²

As consecutive integers: 30 + 31 + 32 + 33 + 34

Aliquot sequence: 160 → 218 → 112 → 136 → 134 → 70 → 74 → 40 → 50 → 43 → 1 → 0 — terminates at zero

Representations

In words: one hundred sixty
Ordinal: 160th
Roman numeral: CLX
Binary: 10100000
Octal: 240
Hexadecimal: 0xA0
Base64: oA==
One's complement: 95 (8-bit)

In other bases

ternary (3) 12221

quaternary (4) 2200

quinary (5) 1120

senary (6) 424

septenary (7) 316

nonary (9) 187

undecimal (11) 136

duodecimal (12) 114

tridecimal (13) c4

tetradecimal (14) b6

pentadecimal (15) aa

Historical numeral systems

Babylonian (base 60): 𒁹𒁹 𒌋𒌋𒌋𒌋
Egyptian hieroglyphic: 𓍢𓎆𓎆𓎆𓎆𓎆𓎆
Greek (Milesian): ρξʹ
Mayan (base 20): 𝋨·𝋠
Chinese: 一百六十
Chinese (financial): 壹佰陸拾

In other modern scripts

Eastern Arabic ١٦٠ Devanagari १६० Bengali ১৬০ Tamil ௧௬௦ Thai ๑๖๐ Tibetan ༡༦༠ Khmer ១៦០ Lao ໑໖໐ Burmese ၁၆၀

Digit at this position in famous constants

π — Pi (π): Digit 160 = 0
e — Euler's number (e): Digit 160 = 8
φ — Golden ratio (φ): Digit 160 = 3
√2 — Pythagoras's (√2): Digit 160 = 3
ln 2 — Natural log of 2: Digit 160 = 0
γ — Euler-Mascheroni (γ): Digit 160 = 3

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 160, here are decompositions:

3 + 157 = 160
11 + 149 = 160
23 + 137 = 160
29 + 131 = 160
47 + 113 = 160
53 + 107 = 160
59 + 101 = 160
71 + 89 = 160

Showing the first eight; more decompositions exist.

Unicode codepoint

No-Break Space

U+00A0

Space separator (Zs)

UTF-8 encoding: C2 A0 (2 bytes).

Lookup U+00A0 on Compart ↗ Lookup on FileFormat.Info ↗

Hex color

#0000A0

RGB(0, 0, 160)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.160.

Address: 0.0.0.160
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.160

Unspecified address (0.0.0.0/8) — "this network" placeholder.