561665296 has 40 divisors (see below), whose sum is σ = 1099929600. Its totient is φ = 277831680.

The previous prime is 561665281. The next prime is 561665297. The reversal of 561665296 is 692566165.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (561665297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730000 + ... + 730768.

It is an arithmetic number, because the mean of its divisors is an integer number (27498240).

Almost surely, 2^561665296 is an apocalyptic number.

It is an amenable number.

561665296 is a deficient number, since it is larger than the sum of its proper divisors (538264304).

561665296 is a wasteful number, since it uses less digits than its factorization.

561665296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207 (or 1201 counting only the distinct ones).

The product of its digits is 583200, while the sum is 46.

The square root of 561665296 is about 23699.4788128347. The cubic root of 561665296 is about 825.0732942535.

The spelling of 561665296 in words is "five hundred sixty-one million, six hundred sixty-five thousand, two hundred ninety-six".