561758864 has 40 divisors (see below), whose sum is σ = 1176680640. Its totient is φ = 258899328.

The previous prime is 561758861. The next prime is 561758893. The reversal of 561758864 is 468857165.

It is not an unprimeable number, because it can be changed into a prime (561758861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13724 + ... + 36219.

It is an arithmetic number, because the mean of its divisors is an integer number (29417016).

Almost surely, 2^561758864 is an apocalyptic number.

It is an amenable number.

561758864 is an abundant number, since it is smaller than the sum of its proper divisors (614921776).

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

561758864 is a wasteful number, since it uses less digits than its factorization.

561758864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50007 (or 50001 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 50.

The square root of 561758864 is about 23701.4527824773. The cubic root of 561758864 is about 825.1191081169.

The spelling of 561758864 in words is "five hundred sixty-one million, seven hundred fifty-eight thousand, eight hundred sixty-four".