256631221014254 has 16 divisors (see below), whose sum is σ = 393964802233200. Its totient is φ = 125337325249344.

The previous prime is 256631221014239. The next prime is 256631221014271. The reversal of 256631221014254 is 452410122136652.

It is a Curzon number.

It is a congruent number.

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, 6926226239 + ... + 6926263290.

It is an arithmetic number, because the mean of its divisors is an integer number (24622800139575).

Almost surely, 2^{256631221014254} is an apocalyptic number.

256631221014254 is a deficient number, since it is larger than the sum of its proper divisors (137333581218946).

256631221014254 is a wasteful number, since it uses less digits than its factorization.

256631221014254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13852489747.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 256631221014254 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, two hundred twenty-one million, fourteen thousand, two hundred fifty-four".