564918905 has 4 divisors (see below), whose sum is σ = 677902692. Its totient is φ = 451935120.

The previous prime is 564918883. The next prime is 564918911. The reversal of 564918905 is 509819465.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63696361 + 501222544 = 7981^2 + 22388^2 .

It is not a de Polignac number, because 564918905 - 2²⁸ = 296483449 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 564918905.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56491886 + ... + 56491895.

It is an arithmetic number, because the mean of its divisors is an integer number (169475673).

Almost surely, 2^564918905 is an apocalyptic number.

It is an amenable number.

564918905 is a deficient number, since it is larger than the sum of its proper divisors (112983787).

564918905 is a wasteful number, since it uses less digits than its factorization.

564918905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112983786.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 564918905 is about 23768.0227406488. The cubic root of 564918905 is about 826.6633865599.

The spelling of 564918905 in words is "five hundred sixty-four million, nine hundred eighteen thousand, nine hundred five".