72618656 has 24 divisors (see below), whose sum is σ = 155965824. Its totient is φ = 33008320.

The previous prime is 72618641. The next prime is 72618661. The reversal of 72618656 is 65681627.

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, 102800 + ... + 103503.

It is an arithmetic number, because the mean of its divisors is an integer number (6498576).

Almost surely, 2^72618656 is an apocalyptic number.

It is an amenable number.

72618656 is an abundant number, since it is smaller than the sum of its proper divisors (83347168).

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

72618656 is a wasteful number, since it uses less digits than its factorization.

72618656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206324 (or 206316 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 72618656 is about 8521.6580546276. The cubic root of 72618656 is about 417.2049017257.

The spelling of 72618656 in words is "seventy-two million, six hundred eighteen thousand, six hundred fifty-six".