561838672 has 20 divisors (see below), whose sum is σ = 1089235840. Its totient is φ = 280745568.

The previous prime is 561838657. The next prime is 561838789. The reversal of 561838672 is 276838165.

561838672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 18163 + ... + 38125.

It is an arithmetic number, because the mean of its divisors is an integer number (54461792).

Almost surely, 2^561838672 is an apocalyptic number.

It is an amenable number.

561838672 is a deficient number, since it is larger than the sum of its proper divisors (527397168).

561838672 is a wasteful number, since it uses less digits than its factorization.

561838672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21730 (or 21724 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 561838672 is about 23703.1363325616. The cubic root of 561838672 is about 825.1581806275.

The spelling of 561838672 in words is "five hundred sixty-one million, eight hundred thirty-eight thousand, six hundred seventy-two".