561131420640 has 192 divisors, whose sum is σ = 2040075072000. Its totient is φ = 126988646400.

The previous prime is 561131420621. The next prime is 561131420669. The reversal of 561131420640 is 46024131165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487390 + ... + 1166109.

It is an arithmetic number, because the mean of its divisors is an integer number (10625391000).

Almost surely, 2^561131420640 is an apocalyptic number.

It is an amenable number.

561131420640 is an abundant number, since it is smaller than the sum of its proper divisors (1478943651360).

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

561131420640 is a wasteful number, since it uses less digits than its factorization.

561131420640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653625 (or 1653617 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 561131420640 in words is "five hundred sixty-one billion, one hundred thirty-one million, four hundred twenty thousand, six hundred forty".