72656512 has 32 divisors (see below), whose sum is σ = 145141920. Its totient is φ = 36228864.

The previous prime is 72656503. The next prime is 72656527. The reversal of 72656512 is 21565627.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×72656512² = 10557937472012288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74653 + ... + 75619.

It is an arithmetic number, because the mean of its divisors is an integer number (4535685).

Almost surely, 2^72656512 is an apocalyptic number.

It is an amenable number.

72656512 is a deficient number, since it is larger than the sum of its proper divisors (72485408).

72656512 is an equidigital number, since it uses as much as digits as its factorization.

72656512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568 (or 1556 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 72656512 is about 8523.8789292200. The cubic root of 72656512 is about 417.2773852352.

The spelling of 72656512 in words is "seventy-two million, six hundred fifty-six thousand, five hundred twelve".