640590108928 has 72 divisors (see below), whose sum is σ = 1594195888320. Its totient is φ = 249580554240.

The previous prime is 640590108923. The next prime is 640590108931. The reversal of 640590108928 is 829801095046.

It is not an unprimeable number, because it can be changed into a prime (640590108923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16229023 + ... + 16268446.

It is an arithmetic number, because the mean of its divisors is an integer number (22141609560).

Almost surely, 2^640590108928 is an apocalyptic number.

It is an amenable number.

640590108928 is an abundant number, since it is smaller than the sum of its proper divisors (953605779392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640590108928 is a wasteful number, since it uses less digits than its factorization.

640590108928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32497503 (or 32497489 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 640590108928 in words is "six hundred forty billion, five hundred ninety million, one hundred eight thousand, nine hundred twenty-eight".