564402645 has 24 divisors (see below), whose sum is σ = 987991992. Its totient is φ = 298032000.

The previous prime is 564402571. The next prime is 564402653. The reversal of 564402645 is 546204465.

564402645 is a `hidden beast` number, since 5 + 6 + 4 + 4 + 0 + 2 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 341288676 + 223113969 = 18474^2 + 14937^2 .

It is not a de Polignac number, because 564402645 - 2⁸ = 564402389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57546 + ... + 66635.

It is an arithmetic number, because the mean of its divisors is an integer number (41166333).

Almost surely, 2^564402645 is an apocalyptic number.

It is an amenable number.

564402645 is a deficient number, since it is larger than the sum of its proper divisors (423589347).

564402645 is a wasteful number, since it uses less digits than its factorization.

564402645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124293 (or 124290 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 564402645 is about 23757.1598681324. The cubic root of 564402645 is about 826.4114900447.

The spelling of 564402645 in words is "five hundred sixty-four million, four hundred two thousand, six hundred forty-five".