1,568
1,568 is a composite number, even, a calendar year.
Notable events — 1568 AD
- May 23 The Eighty Years' War (Dutch revolt) erupts at the Battle of Heiligerlee.
- May 16 Mary Queen of Scots flees to England and is imprisoned.
- Jun 5 The Duke of Alba executes the Counts of Egmont and Hoorn in Brussels.
Events compiled from Wikipedia ↗ · Licensed CC BY-SA 4.0
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
-
Monday
January 1, 1568
- Ended on
-
Tuesday
December 31, 1568
- Friday the 13ths
-
2
2 Friday the 13ths this year.
- Decade
-
1560s
1560–1569
- Century
-
16th century
1501–1600
- Millennium
-
2nd millennium
1001–2000
- Years ago
-
458
458 years before 2026.
In other calendars
- Hebrew
-
5328 / 5329 AM
Rosh Hashanah falls in September/October.
- Islamic Hijri
-
975 / 976 AH
Lunar calendar; year spans differ from Gregorian.
- Chinese
-
Year of the zodiac:Earth zodiac:Dragon
Sexagenary cycle position 5 of 60. Lunar new year falls in late January / mid-February.
- Buddhist Era
-
2111 BE
Counted from the parinirvana of the Buddha (Theravada / Thai / Sri Lankan convention).
- Persian Solar Hijri
-
946 / 947 SH
Iranian calendar; Nowruz (new year) falls on the spring equinox.
- Ethiopian
-
1560 / 1561 ET
Year boundary at Enkutatash (September 11/12).
- Indian National (Saka)
-
1490 / 1489 Saka
Indian national calendar; year starts in March.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 20
- Digit product
- 240
- Digital root
- 2
- Palindrome
- No
- Bit width
- 11 bits
- Reversed
- 8,651
- Recamán's sequence
- a(1,364) = 1,568
- Square (n²)
- 2,458,624
- Cube (n³)
- 3,855,122,432
- Divisor count
- 18
- σ(n) — sum of divisors
- 3,591
- φ(n) — Euler's totient
- 672
- Sum of prime factors
- 24
Primality
Prime factorization: 2 5 × 7 2
Divisors & multiples
Sums & aliquot sequence
Representations
- In words
- one thousand five hundred sixty-eight
- Ordinal
- 1568th
- Roman numeral
- MDLXVIII
- Binary
- 11000100000
- Octal
- 3040
- Hexadecimal
- 0x620
- Base64
- BiA=
- One's complement
- 63,967 (16-bit)
Historical numeral systems
- Babylonian (base 60)
- 𒌋𒌋𒁹𒁹𒁹𒁹𒁹𒁹 𒁹𒁹𒁹𒁹𒁹𒁹𒁹𒁹
- Egyptian hieroglyphic
- 𓆼𓍢𓍢𓍢𓍢𓍢𓎆𓎆𓎆𓎆𓎆𓎆𓏺𓏺𓏺𓏺𓏺𓏺𓏺𓏺
- Greek (Milesian)
- ͵αφξηʹ
- Mayan (base 20)
- 𝋣·𝋲·𝋨
- Chinese
- 一千五百六十八
- Chinese (financial)
- 壹仟伍佰陸拾捌
Digit at this position in famous constants
- π — Pi (π)
- Digit 1,568 = 8
- e — Euler's number (e)
- Digit 1,568 = 9
- φ — Golden ratio (φ)
- Digit 1,568 = 5
- √2 — Pythagoras's (√2)
- Digit 1,568 = 1
- ln 2 — Natural log of 2
- Digit 1,568 = 1
- γ — Euler-Mascheroni (γ)
- Digit 1,568 = 4
Also seen as
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1568, here are decompositions:
- 19 + 1549 = 1568
- 37 + 1531 = 1568
- 79 + 1489 = 1568
- 97 + 1471 = 1568
- 109 + 1459 = 1568
- 139 + 1429 = 1568
- 241 + 1327 = 1568
- 271 + 1297 = 1568
Showing the first eight; more decompositions exist.
UTF-8 encoding: D8 A0 (2 bytes).
As an unsigned 32-bit integer, this is the IPv4 address 0.0.6.32.
- Address
- 0.0.6.32
- Class
- reserved
- IPv4-mapped IPv6
- ::ffff:0.0.6.32
Unspecified address (0.0.0.0/8) — "this network" placeholder.
The digit sequence 1568 first appears in π at position 20,682 of the decimal expansion (the 20,682ordinal-suffix:nd digit after the integer 3).
Search range: the first 1,000,000 fractional digits of π. Any 6-digit-or-shorter string is virtually guaranteed to appear in there — the more interesting signal is the position.