564818961 has 32 divisors (see below), whose sum is σ = 872301568. Its totient is φ = 318427200.

The previous prime is 564818959. The next prime is 564818983. The reversal of 564818961 is 169818465.

It is not a de Polignac number, because 564818961 - 2¹ = 564818959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 564818961.

It is not an unprimeable number, because it can be changed into a prime (564818921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 536886 + ... + 537936.

It is an arithmetic number, because the mean of its divisors is an integer number (27259424).

Almost surely, 2^564818961 is an apocalyptic number.

It is an amenable number.

564818961 is a deficient number, since it is larger than the sum of its proper divisors (307482607).

564818961 is a wasteful number, since it uses less digits than its factorization.

564818961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381.

The product of its digits is 414720, while the sum is 48.

The square root of 564818961 is about 23765.9201589166. The cubic root of 564818961 is about 826.6146332978.

The spelling of 564818961 in words is "five hundred sixty-four million, eight hundred eighteen thousand, nine hundred sixty-one".