564894618 has 16 divisors (see below), whose sum is σ = 1130024640. Its totient is φ = 188258976.

The previous prime is 564894613. The next prime is 564894619. The reversal of 564894618 is 816498465.

It is not an unprimeable number, because it can be changed into a prime (564894613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44643 + ... + 55881.

It is an arithmetic number, because the mean of its divisors is an integer number (70626540).

Almost surely, 2^564894618 is an apocalyptic number.

564894618 is an abundant number, since it is smaller than the sum of its proper divisors (565130022).

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

564894618 is a wasteful number, since it uses less digits than its factorization.

564894618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19621.

The product of its digits is 1658880, while the sum is 51.

The square root of 564894618 is about 23767.5118176051. The cubic root of 564894618 is about 826.6515397495.

The spelling of 564894618 in words is "five hundred sixty-four million, eight hundred ninety-four thousand, six hundred eighteen".