64 (number)
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64 is the natural number following 63 and preceding 65.
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| Cardinal | sixty-four | ||
| Ordinal | 64th (sixty-fourth) | ||
| Numeral system | |||
| Factorization | <math>2^6\,\!<math> | ||
| Divisors | 2, 4, 8, 16, 32 | ||
| Roman numeral | LXIV | ||
| Binary | 1000000 | ||
| Hexadecimal | 40 | ||
In mathematics
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.
In science
- The atomic number of gadolinium, a lanthanide
In astronomy,
- Messier object M64, a magnitude 9.0 galaxy in the constellation Coma Berenices, also known as the Black Eye Galaxy.
- The New General Catalogue object (http://www.ngcic.org/) NGC 64, a barred spiral galaxy in the constellation Cetus
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -832 April 11 and ended on 430 May 8. The duration of Saros series 64 was 1262.1 years, and it contained 71 solar eclipses.
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -801 August 9 and ended on 714 February 4. The duration of Saros series 64 was 1514.5 years, and it contained 85 lunar eclipses.
In other fields
Sixty-four is also:
- 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 (dark) and white (light) 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.
- Slang term referring to a 1964 Chevy Impala SS, often configured as a lowrider, a popular subject among early-90's gangsta rap.es:Sesenta y cuatro