The Nintendo 64 video game console and (historically) the Commodore 64.In 8-bit home computers, a common shorthand for the Commodore 64.Base 64 is used in with Base64 encoding and other data compression formats.In some computer programming languages, the size in bits of certain data types.The New General Catalogue object NGC 64, a barred spiral galaxy in the constellation Cetus.Messier object M64, a magnitude 9.0 galaxy in the constellation Coma Berenices, also known as the Black Eye Galaxy.The atomic number of gadolinium, a lanthanide.Ħ4 is the index of Graham's number in the rapidly growing sequence 3 ↑↑↑↑3, 3 ↑ 3↑↑↑↑3 3,…

Ħ4 is a superperfect number-a number such that σ(σ( n)) = 2 n. In base 10, no integer added up to its own digits yields 64, hence it is a self number. Since it is possible to find sequences of 64 consecutive integers such that each inner member shares a factor with either the first or the last member, 64 is an Erdős–Woods number. 64 is also the first whole number (greater than 1) that is both a perfect square and a perfect cube. It is also a dodecagonal number and a centered triangular number. 64 is the sum of Euler's totient function for the first fourteen integers. It is the lowest positive power of two that is adjacent to neither a Mersenne prime nor a Fermat prime. It is the smallest number with exactly seven divisors. Sixty-four is the square of 8, the cube of 4, and the sixth power of 2.

64 number