564321636 has 18 divisors (see below), whose sum is σ = 1426479782. Its totient is φ = 188107200.

The previous prime is 564321631. The next prime is 564321649. The reversal of 564321636 is 636123465.

564321636 is a `hidden beast` number, since 5 + 643 + 2 + 1 + 6 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 287099136 + 277222500 = 16944^2 + 16650^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 15675601 = 564321636 / (5 + 6 + 4 + 3 + 2 + 1 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 564321636.

It is not an unprimeable number, because it can be changed into a prime (564321631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7837765 + ... + 7837836.

Almost surely, 2^564321636 is an apocalyptic number.

It is an amenable number.

564321636 is an abundant number, since it is smaller than the sum of its proper divisors (862158146).

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

564321636 is a wasteful number, since it uses less digits than its factorization.

564321636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15675611 (or 15675606 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 564321636 is about 23755.4548683034. The cubic root of 564321636 is about 826.3719497318.

The spelling of 564321636 in words is "five hundred sixty-four million, three hundred twenty-one thousand, six hundred thirty-six".