561894679952 has 20 divisors (see below), whose sum is σ = 1145969413680. Its totient is φ = 266160637728.

The previous prime is 561894679949. The next prime is 561894679991. The reversal of 561894679952 is 259976498165.

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, 924168578 + ... + 924169185.

It is an arithmetic number, because the mean of its divisors is an integer number (57298470684).

Almost surely, 2^561894679952 is an apocalyptic number.

It is an amenable number.

561894679952 is an abundant number, since it is smaller than the sum of its proper divisors (584074733728).

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

561894679952 is a wasteful number, since it uses less digits than its factorization.

561894679952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848337790 (or 1848337784 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 71.

The spelling of 561894679952 in words is "five hundred sixty-one billion, eight hundred ninety-four million, six hundred seventy-nine thousand, nine hundred fifty-two".