256631677045148 has 12 divisors (see below), whose sum is σ = 455257564073760. Its totient is φ = 126558087309792.

The previous prime is 256631677045147. The next prime is 256631677045151. The reversal of 256631677045148 is 841540776136652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256631677045147) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 439437802868 + ... + 439437803451.

It is an arithmetic number, because the mean of its divisors is an integer number (37938130339480).

Almost surely, 2^{256631677045148} is an apocalyptic number.

It is an amenable number.

256631677045148 is a deficient number, since it is larger than the sum of its proper divisors (198625887028612).

256631677045148 is a wasteful number, since it uses less digits than its factorization.

256631677045148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878875606396 (or 878875606394 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 65.

The spelling of 256631677045148 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, six hundred seventy-seven million, forty-five thousand, one hundred forty-eight".