561279932928 has 1600 divisors, whose sum is σ = 2108169068544. Its totient is φ = 146313216000.

The previous prime is 561279932909. The next prime is 561279932987. The reversal of 561279932928 is 829239972165.

561279932928 is a `hidden beast` number, since 5 + 612 + 7 + 9 + 9 + 3 + 2 + 9 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7905351133 + ... + 7905351203.

Almost surely, 2^561279932928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561279932928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054084534272).

561279932928 is an abundant number, since it is smaller than the sum of its proper divisors (1546889135616).

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

561279932928 is a wasteful number, since it uses less digits than its factorization.

561279932928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 174 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 561279932928 in words is "five hundred sixty-one billion, two hundred seventy-nine million, nine hundred thirty-two thousand, nine hundred twenty-eight".