561253648 has 20 divisors (see below), whose sum is σ = 1094360140. Its totient is φ = 278838144.

The previous prime is 561253639. The next prime is 561253661. The reversal of 561253648 is 846352165.

It can be written as a sum of positive squares in 2 ways, for example, as 129777664 + 431475984 = 11392^2 + 20772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 561253648.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109203 + ... + 114226.

It is an arithmetic number, because the mean of its divisors is an integer number (54718007).

Almost surely, 2^561253648 is an apocalyptic number.

It is an amenable number.

561253648 is a deficient number, since it is larger than the sum of its proper divisors (533106492).

561253648 is a wasteful number, since it uses less digits than its factorization.

561253648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223594 (or 223588 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 561253648 is about 23690.7924730263. The cubic root of 561253648 is about 824.8716778683.

The spelling of 561253648 in words is "five hundred sixty-one million, two hundred fifty-three thousand, six hundred forty-eight".