561683456 has 22 divisors (see below), whose sum is σ = 1122820440. Its totient is φ = 280841216.

The previous prime is 561683449. The next prime is 561683471. The reversal of 561683456 is 654386165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 273236 + ... + 275283.

Almost surely, 2^561683456 is an apocalyptic number.

It is an amenable number.

561683456 is a deficient number, since it is larger than the sum of its proper divisors (561136984).

561683456 is an equidigital number, since it uses as much as digits as its factorization.

561683456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548539 (or 548521 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 561683456 is about 23699.8619405262. The cubic root of 561683456 is about 825.0821863639.

The spelling of 561683456 in words is "five hundred sixty-one million, six hundred eighty-three thousand, four hundred fifty-six".