72561968 has 10 divisors (see below), whose sum is σ = 140588844. Its totient is φ = 36280976.

The previous prime is 72561911. The next prime is 72561977. The reversal of 72561968 is 86916527.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2267546 + ... + 2267577.

Almost surely, 2^72561968 is an apocalyptic number.

It is an amenable number.

72561968 is a deficient number, since it is larger than the sum of its proper divisors (68026876).

72561968 is a wasteful number, since it uses less digits than its factorization.

72561968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535131 (or 4535125 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 72561968 is about 8518.3312919844. The cubic root of 72561968 is about 417.0963131548.

The spelling of 72561968 in words is "seventy-two million, five hundred sixty-one thousand, nine hundred sixty-eight".