320125600640 has 64 divisors (see below), whose sum is σ = 769146300000. Its totient is φ = 127406721024.

The previous prime is 320125600633. The next prime is 320125600643. The reversal of 320125600640 is 46006521023.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320125600643) 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, 1129415 + ... + 1384134.

Almost surely, 2^320125600640 is an apocalyptic number.

It is an amenable number.

320125600640 is an abundant number, since it is smaller than the sum of its proper divisors (449020699360).

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

320125600640 is a wasteful number, since it uses less digits than its factorization.

320125600640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513767 (or 2513755 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 320125600640 in words is "three hundred twenty billion, one hundred twenty-five million, six hundred thousand, six hundred forty".