561240256 has 14 divisors (see below), whose sum is σ = 1113711260. Its totient is φ = 280620096.

The previous prime is 561240247. The next prime is 561240271. The reversal of 561240256 is 652042165.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4384626 + ... + 4384753.

Almost surely, 2^561240256 is an apocalyptic number.

It is an amenable number.

561240256 is a deficient number, since it is larger than the sum of its proper divisors (552471004).

561240256 is an equidigital number, since it uses as much as digits as its factorization.

561240256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8769391 (or 8769381 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 561240256 is about 23690.5098298876. The cubic root of 561240256 is about 824.8651170977.

The spelling of 561240256 in words is "five hundred sixty-one million, two hundred forty thousand, two hundred fifty-six".