Data types, php and mongo, where is the problem?

Question

PHP

In general, we use one database as a team. All of them from NumberLong("995713968209604608") take an integer, and I have a float with an exponent, because of this, half of the functionality does not work.
My system is 64 bit, why are there problems? How to fix them? Check what? How to make sure php works in 64 bit mode and mongo driver?
ubuntu 14/04