561888236663217 has 24 divisors (see below), whose sum is σ = 841677903786720. Its totient is φ = 374591402327520.

The previous prime is 561888236663183. The next prime is 561888236663231. The reversal of 561888236663217 is 712366632888165.

It is not a de Polignac number, because 561888236663217 - 2²³ = 561888228274609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561888236662217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135024042 + ... + 139123212.

It is an arithmetic number, because the mean of its divisors is an integer number (35069912657780).

Almost surely, 2^{561888236663217} is an apocalyptic number.

It is an amenable number.

561888236663217 is a deficient number, since it is larger than the sum of its proper divisors (279789667123503).

561888236663217 is an equidigital number, since it uses as much as digits as its factorization.

561888236663217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663275 (or 4663263 counting only the distinct ones).

The product of its digits is 836075520, while the sum is 72.

The spelling of 561888236663217 in words is "five hundred sixty-one trillion, eight hundred eighty-eight billion, two hundred thirty-six million, six hundred sixty-three thousand, two hundred seventeen".