561520056 has 16 divisors (see below), whose sum is σ = 1403800200. Its totient is φ = 187173344.

The previous prime is 561520049. The next prime is 561520093. The reversal of 561520056 is 650025165.

It is a congruent number.

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, 11698311 + ... + 11698358.

Almost surely, 2^561520056 is an apocalyptic number.

It is an amenable number.

561520056 is an abundant number, since it is smaller than the sum of its proper divisors (842280144).

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

561520056 is a wasteful number, since it uses less digits than its factorization.

561520056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23396678 (or 23396674 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 561520056 is about 23696.4144123114. The cubic root of 561520056 is about 825.0021700586.

The spelling of 561520056 in words is "five hundred sixty-one million, five hundred twenty thousand, fifty-six".