561409256 has 32 divisors (see below), whose sum is σ = 1088186880. Its totient is φ = 271252800.

The previous prime is 561409183. The next prime is 561409267. The reversal of 561409256 is 652904165.

561409256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238646 + ... + 240986.

It is an arithmetic number, because the mean of its divisors is an integer number (34005840).

Almost surely, 2^561409256 is an apocalyptic number.

It is an amenable number.

561409256 is a deficient number, since it is larger than the sum of its proper divisors (526777624).

561409256 is a wasteful number, since it uses less digits than its factorization.

561409256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3345 (or 3341 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 561409256 is about 23694.0763905243. The cubic root of 561409256 is about 824.9479029239.

The spelling of 561409256 in words is "five hundred sixty-one million, four hundred nine thousand, two hundred fifty-six".