564551856 has 150 divisors (see below), whose sum is σ = 1791522612. Its totient is φ = 170216640.

The previous prime is 564551843. The next prime is 564551857. The reversal of 564551856 is 658155465.

564551856 is a `hidden beast` number, since 564 + 5 + 5 + 1 + 85 + 6 = 666.

It is a super-2 number, since 2×564551856² = 637437596226089472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (564551857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2836845 + ... + 2837043.

Almost surely, 2^564551856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 564551856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895761306).

564551856 is an abundant number, since it is smaller than the sum of its proper divisors (1226970756).

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

564551856 is a wasteful number, since it uses less digits than its factorization.

564551856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429 (or 215 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 564551856 is about 23760.2999981061. The cubic root of 564551856 is about 826.4843097011.

It can be divided in two parts, 56455 and 1856, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 564551856 in words is "five hundred sixty-four million, five hundred fifty-one thousand, eight hundred fifty-six".