561055056 has 40 divisors (see below), whose sum is σ = 1483104480. Its totient is φ = 182668416.

The previous prime is 561055039. The next prime is 561055069. The reversal of 561055056 is 650550165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133851 + ... + 137978.

It is an arithmetic number, because the mean of its divisors is an integer number (37077612).

Almost surely, 2^561055056 is an apocalyptic number.

It is an amenable number.

561055056 is an abundant number, since it is smaller than the sum of its proper divisors (922049424).

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

561055056 is a wasteful number, since it uses less digits than its factorization.

561055056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271883 (or 271877 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 561055056 is about 23686.6007692113. The cubic root of 561055056 is about 824.7743765016.

The spelling of 561055056 in words is "five hundred sixty-one million, fifty-five thousand, fifty-six".