# What is the maximum 64 bit integer (number) value? [closed]

I already know that the maximum integers for ranges higher than 24-bit (16 777 216) will very likely exceed 1 000 000 000, so, what is the maximum 64 bit integer? It is larger than 10 bilion?

• This is more of a math.stackexchange.com question, surely? – Tommy Dec 26 '19 at 17:58
• This is in no way related to retro computing. If at all it's about computing in general or more fitting math, as it's about numeric systems. – Raffzahn Dec 26 '19 at 18:12
• Have you heard of Google? Type "maximum 64 bit integer" into google and it's the first answer returned, you don't even have to click through yo a page. – davidbak Dec 27 '19 at 14:58

Ten billion can be represented in 34 bits, never mind 64. The hexadecimal representation (in which each digit contains four bits) is `0x2540BE400`.
The maximum (unsigned) 64-bit integer is `18446744073709551615`. This is (2^64)-1, which is essentially the square of (2^32)-1, which is "about" 4 billion.