561601660552 has 16 divisors (see below), whose sum is σ = 1053902365200. Its totient is φ = 280561029840.

The previous prime is 561601660537. The next prime is 561601660589. The reversal of 561601660552 is 255066106165.

It is a junction number, because it is equal to n+sod(n) for n = 561601660499 and 561601660508.

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, 29965102 + ... + 29983837.

It is an arithmetic number, because the mean of its divisors is an integer number (65868897825).

Almost surely, 2^561601660552 is an apocalyptic number.

It is an amenable number.

561601660552 is a deficient number, since it is larger than the sum of its proper divisors (492300704648).

561601660552 is a wasteful number, since it uses less digits than its factorization.

561601660552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59950116 (or 59950112 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 561601660552 in words is "five hundred sixty-one billion, six hundred one million, six hundred sixty thousand, five hundred fifty-two".