256968135376 has 40 divisors (see below), whose sum is σ = 524484625280. Its totient is φ = 121627713024.

The previous prime is 256968135331. The next prime is 256968135379. The reversal of 256968135376 is 673531869652.

It is a super-2 number, since 2×256968135376² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256968135379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68425 + ... + 720151.

It is an arithmetic number, because the mean of its divisors is an integer number (13112115632).

Almost surely, 2^256968135376 is an apocalyptic number.

It is an amenable number.

256968135376 is an abundant number, since it is smaller than the sum of its proper divisors (267516489904).

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

256968135376 is a wasteful number, since it uses less digits than its factorization.

256968135376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653051 (or 653045 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 61.

The spelling of 256968135376 in words is "two hundred fifty-six billion, nine hundred sixty-eight million, one hundred thirty-five thousand, three hundred seventy-six".