561897782052 has 48 divisors (see below), whose sum is σ = 1357448621760. Its totient is φ = 180688181632.

The previous prime is 561897782029. The next prime is 561897782057. The reversal of 561897782052 is 250287798165.

It is not an unprimeable number, because it can be changed into a prime (561897782057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267063 + ... + 1093214.

It is an arithmetic number, because the mean of its divisors is an integer number (28280179620).

Almost surely, 2^561897782052 is an apocalyptic number.

It is an amenable number.

561897782052 is an abundant number, since it is smaller than the sum of its proper divisors (795550839708).

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

561897782052 is a wasteful number, since it uses less digits than its factorization.

561897782052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361500 (or 1361498 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 60.

The spelling of 561897782052 in words is "five hundred sixty-one billion, eight hundred ninety-seven million, seven hundred eighty-two thousand, fifty-two".