561337856 has 20 divisors (see below), whose sum is σ = 1121580372. Its totient is φ = 280668672.

The previous prime is 561337837. The next prime is 561337871. The reversal of 561337856 is 658733165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 547670 + ... + 548693.

Almost surely, 2^561337856 is an apocalyptic number.

It is an amenable number.

561337856 is a deficient number, since it is larger than the sum of its proper divisors (560242516).

561337856 is an equidigital number, since it uses as much as digits as its factorization.

561337856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096381 (or 1096365 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 561337856 is about 23692.5696369136. The cubic root of 561337856 is about 824.9129291641.

The spelling of 561337856 in words is "five hundred sixty-one million, three hundred thirty-seven thousand, eight hundred fifty-six".