561611556606 has 32 divisors (see below), whose sum is σ = 1227659424768. Its totient is φ = 170508251520.

The previous prime is 561611556599. The next prime is 561611556631. The reversal of 561611556606 is 606655116165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88803220 + ... + 88809543.

It is an arithmetic number, because the mean of its divisors is an integer number (38364357024).

Almost surely, 2^561611556606 is an apocalyptic number.

561611556606 is an abundant number, since it is smaller than the sum of its proper divisors (666047868162).

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

561611556606 is a wasteful number, since it uses less digits than its factorization.

561611556606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177612816.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 561611556606 in words is "five hundred sixty-one billion, six hundred eleven million, five hundred fifty-six thousand, six hundred six".