561116651656 has 32 divisors (see below), whose sum is σ = 1147772656800. Its totient is φ = 255045456640.

The previous prime is 561116651621. The next prime is 561116651677. The reversal of 561116651656 is 656156611165.

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, 3789591 + ... + 3934873.

It is an arithmetic number, because the mean of its divisors is an integer number (35867895525).

Almost surely, 2^561116651656 is an apocalyptic number.

It is an amenable number.

561116651656 is an abundant number, since it is smaller than the sum of its proper divisors (586656005144).

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

561116651656 is a wasteful number, since it uses less digits than its factorization.

561116651656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189189 (or 189185 counting only the distinct ones).

The product of its digits is 972000, while the sum is 49.

The spelling of 561116651656 in words is "five hundred sixty-one billion, one hundred sixteen million, six hundred fifty-one thousand, six hundred fifty-six".