561576620 has 24 divisors (see below), whose sum is σ = 1286521488. Its totient is φ = 204209600.

The previous prime is 561576599. The next prime is 561576637. The reversal of 561576620 is 26675165.

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, 1276091 + ... + 1276530.

It is an arithmetic number, because the mean of its divisors is an integer number (53605062).

Almost surely, 2^561576620 is an apocalyptic number.

It is an amenable number.

561576620 is an abundant number, since it is smaller than the sum of its proper divisors (724944868).

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

561576620 is a wasteful number, since it uses less digits than its factorization.

561576620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552641 (or 2552639 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 561576620 is about 23697.6078961569. The cubic root of 561576620 is about 825.0298709723.

The spelling of 561576620 in words is "five hundred sixty-one million, five hundred seventy-six thousand, six hundred twenty".