561864396 has 24 divisors (see below), whose sum is σ = 1313222400. Its totient is φ = 186973072.

The previous prime is 561864377. The next prime is 561864403. The reversal of 561864396 is 693468165.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31896 + ... + 46271.

It is an arithmetic number, because the mean of its divisors is an integer number (54717600).

Almost surely, 2^561864396 is an apocalyptic number.

It is an amenable number.

561864396 is an abundant number, since it is smaller than the sum of its proper divisors (751358004).

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

561864396 is a wasteful number, since it uses less digits than its factorization.

561864396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78773 (or 78771 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 561864396 is about 23703.6789549639. The cubic root of 561864396 is about 825.1707738304.

The spelling of 561864396 in words is "five hundred sixty-one million, eight hundred sixty-four thousand, three hundred ninety-six".