561716560 has 20 divisors (see below), whose sum is σ = 1305991188. Its totient is φ = 224686592.

The previous prime is 561716549. The next prime is 561716563. The reversal of 561716560 is 65617165.

It can be written as a sum of positive squares in 2 ways, for example, as 138015504 + 423701056 = 11748^2 + 20584^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561716563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3510649 + ... + 3510808.

Almost surely, 2^561716560 is an apocalyptic number.

It is an amenable number.

561716560 is an abundant number, since it is smaller than the sum of its proper divisors (744274628).

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

561716560 is a wasteful number, since it uses less digits than its factorization.

561716560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021470 (or 7021464 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561716560 is about 23700.5603309289. The cubic root of 561716560 is about 825.0983953655.

The spelling of 561716560 in words is "five hundred sixty-one million, seven hundred sixteen thousand, five hundred sixty".