564681820 has 12 divisors (see below), whose sum is σ = 1185831864. Its totient is φ = 225872720.

The previous prime is 564681797. The next prime is 564681851. The reversal of 564681820 is 28186465.

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 3 ways as a sum of consecutive naturals, for example, 14117026 + ... + 14117065.

It is an arithmetic number, because the mean of its divisors is an integer number (98819322).

Almost surely, 2^564681820 is an apocalyptic number.

It is an amenable number.

564681820 is an abundant number, since it is smaller than the sum of its proper divisors (621150044).

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

564681820 is a wasteful number, since it uses less digits than its factorization.

564681820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28234100 (or 28234098 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 564681820 is about 23763.0347388544. The cubic root of 564681820 is about 826.5477257625.

The spelling of 564681820 in words is "five hundred sixty-four million, six hundred eighty-one thousand, eight hundred twenty".