158 (number)

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157 158 159
Cardinal one hundred fifty-eight
Ordinal 158th
(one hundred and fifty-eighth)
Factorization 2 × 79
Divisors 1, 2, 79, 158
Roman numeral CLVIII
Binary 100111102
Ternary 122123
Quaternary 21324
Quinary 11135
Senary 4226
Octal 2368
Duodecimal 11212
Hexadecimal 9E16
Vigesimal 7I20
Base 36 4E36

158 (one hundred [and] fifty-eight) is the natural number following 157 and preceding 159.

In mathematics[edit]

158 is a nontotient, since there is no integer with 158 coprimes below it. 158 is a Perrin number, appearing after 68, 90, 119.

158 is the number of digits in the decimal expansion of 100!, the product of all the natural numbers up to and including 100.

In the military[edit]

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158 is also:

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