561118164 has 24 divisors (see below), whose sum is σ = 1316064960. Its totient is φ = 186069504.

The previous prime is 561118139. The next prime is 561118219. The reversal of 561118164 is 461811165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118824 + ... + 123455.

It is an arithmetic number, because the mean of its divisors is an integer number (54836040).

Almost surely, 2^561118164 is an apocalyptic number.

It is an amenable number.

561118164 is an abundant number, since it is smaller than the sum of its proper divisors (754946796).

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

561118164 is a wasteful number, since it uses less digits than its factorization.

561118164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242479 (or 242477 counting only the distinct ones).

The product of its digits is 5760, while the sum is 33.

The square root of 561118164 is about 23687.9328773112. The cubic root of 561118164 is about 824.8052991412.

The spelling of 561118164 in words is "five hundred sixty-one million, one hundred eighteen thousand, one hundred sixty-four".