256911692566848 has 112 divisors (see below), whose sum is σ = 741556201659840. Its totient is φ = 77850386636800.

The previous prime is 256911692566811. The next prime is 256911692566933. The reversal of 256911692566848 is 848665296119652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100838008 + ... + 103354376.

It is an arithmetic number, because the mean of its divisors is an integer number (6621037514820).

Almost surely, 2^{256911692566848} is an apocalyptic number.

It is an amenable number.

256911692566848 is an abundant number, since it is smaller than the sum of its proper divisors (484644509092992).

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

256911692566848 is a wasteful number, since it uses less digits than its factorization.

256911692566848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564736 (or 2564726 counting only the distinct ones).

The product of its digits is 2687385600, while the sum is 78.

The spelling of 256911692566848 in words is "two hundred fifty-six trillion, nine hundred eleven billion, six hundred ninety-two million, five hundred sixty-six thousand, eight hundred forty-eight".