256426690698 has 24 divisors (see below), whose sum is σ = 555657923808. Its totient is φ = 85465292712.

The previous prime is 256426690651. The next prime is 256426690699. The reversal of 256426690698 is 896096624652.

256426690698 is a `hidden beast` number, since 2 + 564 + 2 + 6 + 6 + 9 + 0 + 69 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (256426690699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 701190 + ... + 1002257.

It is an arithmetic number, because the mean of its divisors is an integer number (23152413492).

Almost surely, 2^256426690698 is an apocalyptic number.

256426690698 is an abundant number, since it is smaller than the sum of its proper divisors (299231233110).

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

256426690698 is a wasteful number, since it uses less digits than its factorization.

256426690698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711818 (or 1711815 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 63.

The spelling of 256426690698 in words is "two hundred fifty-six billion, four hundred twenty-six million, six hundred ninety thousand, six hundred ninety-eight".