72657076432 has 20 divisors (see below), whose sum is σ = 140786871876. Its totient is φ = 36324980480.

The previous prime is 72657076423. The next prime is 72657076433. The reversal of 72657076432 is 23467075627.

It can be written as a sum of positive squares in 2 ways, for example, as 58934359696 + 13722716736 = 242764^2 + 117144^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72657076433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49819 + ... + 384442.

Almost surely, 2^72657076432 is an apocalyptic number.

It is an amenable number.

72657076432 is a deficient number, since it is larger than the sum of its proper divisors (68129795444).

72657076432 is a wasteful number, since it uses less digits than its factorization.

72657076432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444726 (or 444720 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 49.

The spelling of 72657076432 in words is "seventy-two billion, six hundred fifty-seven million, seventy-six thousand, four hundred thirty-two".