65,535

← 65534 65535 65536 →
List of numbers Integers ← 0 10k 20k 30k 40k 50k 60k 70k 80k 90k →
Cardinal	sixty-five thousand five hundred thirty-five
Ordinal	th
Factorization	3 x 5 x 17 x 257
Divisors	16
Greek numeral	${\stackrel {\digamma }{\mathrm {M} }}$͵εφλε´
Roman numeral	LXVDXXXV
Binary	11111111111111112
Ternary	100222200203
Senary	12232236
Octal	1777778
Duodecimal	31B1312
Hexadecimal	FFFF16

65535 is the integer after 65534 and before 65536.

In mathematics

65535 is a Mersenne number, being $2^{16}-1$. But since its index, 16, is not prime, 65535 cannot be a Mersenne prime. It is the product of the first four Fermat primes: 65535 = (2 + 1)(4 + 1)(16 + 1)(256 + 1). Because of this property, it is possible to construct with compass and straightedge a regular polygon with 65535 sides. See constructible polygon.

65535 is the 15th 626-gonal number, the 5th 6555-gonal number, the 3rd 21846-gonal number.

In computing

65535 is a frequently occurring number in the field of computing because it is the highest number which can be represented by an unsigned 16 bit binary number. Some computer programming environments may have pre-defined constant values representing 65535, with names like "MAX_UNSIGNED_SHORT".

Examples

• 65535 is the limit for many player variables in video games, such as experience points in Dragon Warrior, maximum enchant of items in Lineage 2, money carried in Phantasy Star and Dark Cloud, elemental attribute points in "Castlevania: Order of Ecclesia", score in Star Wars: TIE Fighter stats in The 4th Coming and several limits in Harvest Moon DS, and your ID number in Pokémon.
• In Internet protocols, 65535 is also the number of TCP and UDP ports available at an IP address, since port 0 is reserved.
• Indices in chat groups may well max out at 65535.
• In older computers with processors operating with a 16-bit address bus (such as the MOS Technology 6502 and the Zilog Z80), 65535 was the highest addressable memory location. Such processors thus supported at most 64 kibibytes (64 KiB) of total memory.
• A Java class or interface can have max. 65535 number of methods. The code of a constructor in Java is limited to 65535 bytes.
• In Microsoft Excel 2007, many mathematical computations evaluating to 65535 will display incorrectly. For example =850*77.1 displays as 100000 rather than 65535. Microsoft reports this to be a display-only bug for only 6 floating point numbers near 65535 and 6 near 65536. In Excel 2007, there are 1,048,576 lines and 16,384 columns.