74521564 has 36 divisors (see below), whose sum is σ = 147386736. Its totient is φ = 32892288.

The previous prime is 74521549. The next prime is 74521583. The reversal of 74521564 is 46512547.

It is a hoax number, since the sum of its digits (34) 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 11 ways as a sum of consecutive naturals, for example, 13152 + ... + 17944.

It is an arithmetic number, because the mean of its divisors is an integer number (4094076).

Almost surely, 2^74521564 is an apocalyptic number.

It is an amenable number.

74521564 is a deficient number, since it is larger than the sum of its proper divisors (72865172).

74521564 is a wasteful number, since it uses less digits than its factorization.

74521564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4831 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 74521564 is about 8632.5873294164. The cubic root of 74521564 is about 420.8176889609.

The spelling of 74521564 in words is "seventy-four million, five hundred twenty-one thousand, five hundred sixty-four".