561693956 has 12 divisors (see below), whose sum is σ = 983225040. Its totient is φ = 280772520.

The previous prime is 561693931. The next prime is 561693967. The reversal of 561693956 is 659396165.

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, 551 + ... + 33521.

It is an arithmetic number, because the mean of its divisors is an integer number (81935420).

Almost surely, 2^561693956 is an apocalyptic number.

It is an amenable number.

561693956 is a deficient number, since it is larger than the sum of its proper divisors (421531084).

561693956 is a wasteful number, since it uses less digits than its factorization.

561693956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37234 (or 37232 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 50.

The square root of 561693956 is about 23700.0834597687. The cubic root of 561693956 is about 825.0873276399.

The spelling of 561693956 in words is "five hundred sixty-one million, six hundred ninety-three thousand, nine hundred fifty-six".