72621656 has 16 divisors (see below), whose sum is σ = 136256640. Its totient is φ = 36286560.

The previous prime is 72621643. The next prime is 72621677. The reversal of 72621656 is 65612627.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 19721 + ... + 23111.

It is an arithmetic number, because the mean of its divisors is an integer number (8516040).

Almost surely, 2^72621656 is an apocalyptic number.

It is an amenable number.

72621656 is a deficient number, since it is larger than the sum of its proper divisors (63634984).

72621656 is a wasteful number, since it uses less digits than its factorization.

72621656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074 (or 6070 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 72621656 is about 8521.8340748926. The cubic root of 72621656 is about 417.2106467942.

The spelling of 72621656 in words is "seventy-two million, six hundred twenty-one thousand, six hundred fifty-six".