158 (one hundred [and] fifty-eight) is the natural number following 157 and preceding 159.
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. 100! is 158 digits long. It can be expressed as 9.332 x 10.
In British Rail
The British Rail Class 158 train is a widely used DMU.
References
External links
The Number 158