561796490880 has 256 divisors, whose sum is σ = 2001207686400. Its totient is φ = 148945637376.

The previous prime is 561796490863. The next prime is 561796490903. The reversal of 561796490880 is 88094697165.

561796490880 is a `hidden beast` number, since 5 + 61 + 7 + 9 + 6 + 490 + 8 + 80 = 666.

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, 2895477 + ... + 3083403.

It is an arithmetic number, because the mean of its divisors is an integer number (7817217525).

Almost surely, 2^561796490880 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 561796490880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000603843200).

561796490880 is an abundant number, since it is smaller than the sum of its proper divisors (1439411195520).

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

561796490880 is a wasteful number, since it uses less digits than its factorization.

561796490880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188128 (or 188110 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

It can be divided in two parts, 561796 and 490880, that added together give a square (1052676 = 1026²).

The spelling of 561796490880 in words is "five hundred sixty-one billion, seven hundred ninety-six million, four hundred ninety thousand, eight hundred eighty".