561650656 has 48 divisors (see below), whose sum is σ = 1307305440. Its totient is φ = 232404480.

The previous prime is 561650647. The next prime is 561650669. The reversal of 561650656 is 656056165.

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, 36735 + ... + 49726.

It is an arithmetic number, because the mean of its divisors is an integer number (27235530).

Almost surely, 2^561650656 is an apocalyptic number.

561650656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

561650656 is an abundant number, since it is smaller than the sum of its proper divisors (745654784).

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

561650656 is a wasteful number, since it uses less digits than its factorization.

561650656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86507 (or 86499 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 561650656 is about 23699.1699432702. The cubic root of 561650656 is about 825.0661255843.

The spelling of 561650656 in words is "five hundred sixty-one million, six hundred fifty thousand, six hundred fifty-six".