256631212051670 has 8 divisors (see below), whose sum is σ = 461936181693024. Its totient is φ = 102652484820664.

The previous prime is 256631212051667. The next prime is 256631212051693. The reversal of 256631212051670 is 76150212136652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12831560602574 + ... + 12831560602593.

It is an arithmetic number, because the mean of its divisors is an integer number (57742022711628).

Almost surely, 2^{256631212051670} is an apocalyptic number.

256631212051670 is a deficient number, since it is larger than the sum of its proper divisors (205304969641354).

256631212051670 is a wasteful number, since it uses less digits than its factorization.

256631212051670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25663121205174.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 256631212051670 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, two hundred twelve million, fifty-one thousand, six hundred seventy".