561271056 has 40 divisors (see below), whose sum is σ = 1489142784. Its totient is φ = 182033280.

The previous prime is 561271049. The next prime is 561271079. The reversal of 561271056 is 650172165.

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, 156240 + ... + 159791.

Almost surely, 2^561271056 is an apocalyptic number.

It is an amenable number.

561271056 is an abundant number, since it is smaller than the sum of its proper divisors (927871728).

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

561271056 is a wasteful number, since it uses less digits than its factorization.

561271056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316079 (or 316073 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 561271056 is about 23691.1598702976. The cubic root of 561271056 is about 824.8802059303.

The spelling of 561271056 in words is "five hundred sixty-one million, two hundred seventy-one thousand, fifty-six".