561789768 has 16 divisors (see below), whose sum is σ = 1404474480. Its totient is φ = 187263248.

The previous prime is 561789763. The next prime is 561789779. The reversal of 561789768 is 867987165.

It is not an unprimeable number, because it can be changed into a prime (561789763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11703930 + ... + 11703977.

It is an arithmetic number, because the mean of its divisors is an integer number (87779655).

Almost surely, 2^561789768 is an apocalyptic number.

It is an amenable number.

561789768 is an abundant number, since it is smaller than the sum of its proper divisors (842684712).

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

561789768 is a wasteful number, since it uses less digits than its factorization.

561789768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23407916 (or 23407912 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 57.

The square root of 561789768 is about 23702.1047166702. The cubic root of 561789768 is about 825.1342385788.

The spelling of 561789768 in words is "five hundred sixty-one million, seven hundred eighty-nine thousand, seven hundred sixty-eight".