Converts a number to its Nepali word representation

You may convert any number into a Nepali word by using this function.

For instance,

if you pass 1 it will return एक

or for 45 it will return पैँतालीस

or for large number like 535000 it will return पाँच लाख पैंतीस हजार

and so on...

It is capable to return up to 1 trillion (10^12) (१ हजार उनानसय अर्व)