Advantages of a 64 bit system

Question

From a developer perspective i am trying to understand , what is the selling point of a 64-bit system ?

I understand that more registers are at your disposal , more

Answer 1

A 64-bit system has 64-bit memory addresses instead of 32-bit addresses, and so the maximum amount of memory available is 2⁶⁴ vs 2³². This first quantity is roughly 10¹⁸ bytes, compared to the 10⁹ bytes you can have with the latter quantity. Consequently, it's possible to have a lot more memory in a 64-bit system.