564405815978 has 16 divisors (see below), whose sum is σ = 891490950720. Its totient is φ = 267252961536.

The previous prime is 564405815957. The next prime is 564405816017. The reversal of 564405815978 is 879518504465.

It is a self number, because there is not a number n which added to its sum of digits gives 564405815978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2592950 + ... + 2802177.

It is an arithmetic number, because the mean of its divisors is an integer number (55718184420).

Almost surely, 2^564405815978 is an apocalyptic number.

564405815978 is a deficient number, since it is larger than the sum of its proper divisors (327085134742).

564405815978 is a wasteful number, since it uses less digits than its factorization.

564405815978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397901.

The product of its (nonzero) digits is 48384000, while the sum is 62.

The spelling of 564405815978 in words is "five hundred sixty-four billion, four hundred five million, eight hundred fifteen thousand, nine hundred seventy-eight".