
Les A. answered 04/16/21
I am a computer scientist with 40 years of experience.
It depends on how you encode the data in the 64-bit collection of bits.
The largest integer would be 18,446,744,073,709,551,615.
The range using signed integers would be a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807.
Though there are other ways to encode the bits and get different answers.