56581564 has 24 divisors (see below), whose sum is σ = 111273120. Its totient is φ = 24978624.

The previous prime is 56581537. The next prime is 56581571. The reversal of 56581564 is 46518565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22459 + ... + 24850.

It is an arithmetic number, because the mean of its divisors is an integer number (4636380).

Almost surely, 2^56581564 is an apocalyptic number.

It is an amenable number.

56581564 is a deficient number, since it is larger than the sum of its proper divisors (54691556).

56581564 is a wasteful number, since it uses less digits than its factorization.

56581564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47349 (or 47347 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

The square root of 56581564 is about 7522.0717890751. The cubic root of 56581564 is about 383.9060733092.

The spelling of 56581564 in words is "fifty-six million, five hundred eighty-one thousand, five hundred sixty-four".