72621564 has 12 divisors (see below), whose sum is σ = 169450344. Its totient is φ = 24207184.

The previous prime is 72621559. The next prime is 72621581. The reversal of 72621564 is 46512627.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 3025887 + ... + 3025910.

It is an arithmetic number, because the mean of its divisors is an integer number (14120862).

Almost surely, 2^72621564 is an apocalyptic number.

It is an amenable number.

72621564 is an abundant number, since it is smaller than the sum of its proper divisors (96828780).

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

72621564 is a wasteful number, since it uses less digits than its factorization.

72621564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051804 (or 6051802 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 72621564 is about 8521.8286769918. The cubic root of 72621564 is about 417.2104706145.

The spelling of 72621564 in words is "seventy-two million, six hundred twenty-one thousand, five hundred sixty-four".