how create shorter number?

[PHP2]

I have one large number with 18 decimal places for license key. have any way
that I transfer my number into shorter number or string with some method?

 

[Victor Bazarov]

I have one large number with 18 decimal places for license key. have any way
that I transfer my number into shorter number or string with some method?

Take a look at different number systems, like hex, base-36 (0..9a..z),
or even base-62 (0..9A..Za..z). Base64 is (or at least used to be) quite
common for encoding binary data. BTW, do you have any C++ language
question?

V