number.wiki
Number

65

65 is a composite number, odd, a calendar year.

Deficient Number Octagonal Squarefree Year

Properties

Parity
Odd
Digit count
2
Digit sum
11
Digital root
2
Palindrome
No
Divisor count
4
σ(n) — sum of divisors
84

Primality

Prime factorization: 5 × 13

Divisors & multiples

All divisors (4)
1 · 5 · 13 · 65
Aliquot sum (sum of proper divisors): 19
Factor pairs (a × b = 65)
1 × 65
5 × 13
First multiples
65 · 130 · 195 · 260 · 325 · 390 · 455 · 520 · 585 · 650

Representations

In words
sixty-five
Ordinal
65th
Roman numeral
LXV
Binary
1000001
Octal
101
Hexadecimal
41

Also seen as

ASCII character

As an ASCII codepoint, 65 is A. Printable ASCII character A.

Hex color
#000041
RGB(0, 0, 65)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.65.