72975756964 has 24 divisors (see below), whose sum is σ = 139334854176. Its totient is φ = 33166632000.

The previous prime is 72975756949. The next prime is 72975756991. The reversal of 72975756964 is 46965757927.

It is a super-2 number, since 2×72975756964² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72975756964.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264784 + ... + 464824.

It is an arithmetic number, because the mean of its divisors is an integer number (5805618924).

Almost surely, 2^72975756964 is an apocalyptic number.

It is an amenable number.

72975756964 is a deficient number, since it is larger than the sum of its proper divisors (66359097212).

72975756964 is a wasteful number, since it uses less digits than its factorization.

72975756964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208347 (or 208345 counting only the distinct ones).

The product of its digits is 200037600, while the sum is 67.

The spelling of 72975756964 in words is "seventy-two billion, nine hundred seventy-five million, seven hundred fifty-six thousand, nine hundred sixty-four".