up to base 62 number representation with standard Latin letters and Arabic figure digits

The QString::number(...) static methods and the toDouble(), toInt(), etc methods of QString provide QString representation of number in base from 2 to 36.

The currently used digit are the Arabic figures and the standard Latin letters.

I think this representation could also use the case of the standard Latin letters. This would provide 26 additional characters and extend the possible base representation up to 62.

If you add only 2 characters to the previous character set, then you reach the base 64 representation which could be useful for representing native computer numbers with only one character.