What is the meaning in the 144 Optical Fiber Cable? Especially why 144 fibers?

During studying the telecom underground cable network I came across the Optical Fiber Cable having the 144 fibers (single mode).
I want to know why 144?
Is this a Some standard to have 144 fibers in one cable?
I have also viewed some of the datasheet having 144 fibers Optical Fiber Cable.

I think it might be like that in a single 144 core fibers we avail SDH, Telecommunications and also some fiber spare for future use.