64 (number)
Appearance
64 is the natural number following 63 and preceding 65.
Template:Numbers 60s | |
Cardinal | sixty-four |
Ordinal | 64th (sixty-fourth) |
Numeral system | |
Factorization | |
Divisors | 2, 4, 8, 16, 32 |
Roman numeral | LXIV |
Binary | 1000000 |
Hexadecimal | 40 |
Sixty-four is the square of 8 and the cube of 4. It is the lowest positive power of two that is adjacent to neither a Mersenne prime nor a Fermat prime. It is also a dodecagonal number and a centered triangular number. 64 is a self number.
Sixty-four is also:
- The atomic number of gadolinium, a lanthanide.
- In some computer programming languages, the size in bits of certain data types.
- In China, "64 incident" refers to the Tiananmen Square protests of 1989 which happened on 4 June, 1989.
- In chess or draughts, the total number of black and white squares on the game board.
- The code for international direct dial calls to New Zealand.
- The designation of US Interstate 64, a freeway from Missouri to Virginia.
- The subject of the Beatles song "When I'm Sixty-Four"
- The registry of the U.S. Navy's aircraft carrier USS Constellation (CV-64)
- The number of Braille characters in the old 6-dot system.
- The year AD 64, 64 BC, or 1964.
- In video games, the Nintendo 64 video game console and the Commodore 64. Since 1996, the number 64 is usually the abbreviation or slang for Nintendo 64.
- The maximum number of strokes in any Chinese character.