256631677046720 has 112 divisors (see below), whose sum is σ = 643286723319840. Its totient is φ = 97247001378816.

The previous prime is 256631677046683. The next prime is 256631677046791. The reversal of 256631677046720 is 27640776136652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209227544 + ... + 210450536.

Almost surely, 2^{256631677046720} is an apocalyptic number.

256631677046720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256631677046720 is an abundant number, since it is smaller than the sum of its proper divisors (386655046273120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256631677046720 is a wasteful number, since it uses less digits than its factorization.

256631677046720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257542 (or 1257532 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 62.

The spelling of 256631677046720 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, six hundred seventy-seven million, forty-six thousand, seven hundred twenty".