564390855 has 32 divisors (see below), whose sum is σ = 1146700800. Its totient is φ = 258006816.

The previous prime is 564390821. The next prime is 564390863. The reversal of 564390855 is 558093465.

564390855 is a `hidden beast` number, since 564 + 3 + 9 + 0 + 85 + 5 = 666.

It is not a de Polignac number, because 564390855 - 2¹⁸ = 564128711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 564390855.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297675 + ... + 299564.

It is an arithmetic number, because the mean of its divisors is an integer number (35834400).

Almost surely, 2^564390855 is an apocalyptic number.

564390855 is an abundant number, since it is smaller than the sum of its proper divisors (582309945).

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

564390855 is a wasteful number, since it uses less digits than its factorization.

564390855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597260 (or 597254 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 564390855 is about 23756.9117311152. The cubic root of 564390855 is about 826.4057356072.

The spelling of 564390855 in words is "five hundred sixty-four million, three hundred ninety thousand, eight hundred fifty-five".