561844413928 has 64 divisors (see below), whose sum is σ = 1212176309760. Its totient is φ = 239150900736.

The previous prime is 561844413899. The next prime is 561844413983. The reversal of 561844413928 is 829314448165.

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, 5125825 + ... + 5234287.

It is an arithmetic number, because the mean of its divisors is an integer number (18940254840).

Almost surely, 2^561844413928 is an apocalyptic number.

It is an amenable number.

561844413928 is an abundant number, since it is smaller than the sum of its proper divisors (650331895832).

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

561844413928 is a wasteful number, since it uses less digits than its factorization.

561844413928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109106 (or 109102 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The spelling of 561844413928 in words is "five hundred sixty-one billion, eight hundred forty-four million, four hundred thirteen thousand, nine hundred twenty-eight".