71572564 has 12 divisors (see below), whose sum is σ = 143145184. Its totient is φ = 30673944.

The previous prime is 71572559. The next prime is 71572591. The reversal of 71572564 is 46527517.

71572564 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 1278054 + ... + 1278109.

Almost surely, 2^71572564 is an apocalyptic number.

It is an amenable number.

71572564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71572564 is a wasteful number, since it uses less digits than its factorization.

71572564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556174 (or 2556172 counting only the distinct ones).

The product of its digits is 58800, while the sum is 37.

The square root of 71572564 is about 8460.0569738034. The cubic root of 71572564 is about 415.1918868753.

The spelling of 71572564 in words is "seventy-one million, five hundred seventy-two thousand, five hundred sixty-four".