158 (number)

158 is an even whole number before 159 and after 157.

In mathematics

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

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

In other fields

158 is also:

• The year AD 158 or 158 BC.
• In the Israeli movie Operation Grandma ("Mivtza Safta", מבצע סבתא), the number 158 is implied to be a classified high-rank officer position (Alon says: "Since you've became 158 you became all that?").