561599764 has 24 divisors (see below), whose sum is σ = 1101125088. Its totient is φ = 248372640.

The previous prime is 561599729. The next prime is 561599767. The reversal of 561599764 is 467995165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561599767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170854 + ... + 174109.

It is an arithmetic number, because the mean of its divisors is an integer number (45880212).

Almost surely, 2^561599764 is an apocalyptic number.

It is an amenable number.

561599764 is a deficient number, since it is larger than the sum of its proper divisors (539525324).

561599764 is a wasteful number, since it uses less digits than its factorization.

561599764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345015 (or 345013 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 52.

The square root of 561599764 is about 23698.0962104554. The cubic root of 561599764 is about 825.0412046760.

The spelling of 561599764 in words is "five hundred sixty-one million, five hundred ninety-nine thousand, seven hundred sixty-four".