256563037426 has 16 divisors (see below), whose sum is σ = 409413679200. Its totient is φ = 120163337280.

The previous prime is 256563037349. The next prime is 256563037429. The reversal of 256563037426 is 624730365652.

It is a self number, because there is not a number n which added to its sum of digits gives 256563037426.

It is not an unprimeable number, because it can be changed into a prime (256563037429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17874276 + ... + 17888623.

It is an arithmetic number, because the mean of its divisors is an integer number (25588354950).

Almost surely, 2^256563037426 is an apocalyptic number.

256563037426 is a deficient number, since it is larger than the sum of its proper divisors (152850641774).

256563037426 is a wasteful number, since it uses less digits than its factorization.

256563037426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35763129.

The product of its (nonzero) digits is 5443200, while the sum is 49.

The spelling of 256563037426 in words is "two hundred fifty-six billion, five hundred sixty-three million, thirty-seven thousand, four hundred twenty-six".