561923889804 has 36 divisors (see below), whose sum is σ = 1427628986784. Its totient is φ = 186357159072.

The previous prime is 561923889797. The next prime is 561923889817. The reversal of 561923889804 is 408988329165.

561923889804 is a `hidden beast` number, since 5 + 619 + 2 + 3 + 8 + 8 + 9 + 8 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39609652 + ... + 39623835.

It is an arithmetic number, because the mean of its divisors is an integer number (39656360744).

Almost surely, 2^561923889804 is an apocalyptic number.

It is an amenable number.

561923889804 is an abundant number, since it is smaller than the sum of its proper divisors (865705096980).

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

561923889804 is a wasteful number, since it uses less digits than its factorization.

561923889804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79233694 (or 79233689 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 561923889804 in words is "five hundred sixty-one billion, nine hundred twenty-three million, eight hundred eighty-nine thousand, eight hundred four".