256744354032774 has 64 divisors (see below), whose sum is σ = 581334105876480. Its totient is φ = 83962932000480.

The previous prime is 256744354032707. The next prime is 256744354032779. The reversal of 256744354032774 is 477230453447652.

256744354032774 is a `hidden beast` number, since 2 + 5 + 6 + 7 + 4 + 4 + 354 + 0 + 3 + 277 + 4 = 666.

It is a super-2 number, since 2×256744354032774² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256744354032779) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62008989 + ... + 66019719.

It is an arithmetic number, because the mean of its divisors is an integer number (9083345404320).

Almost surely, 2^{256744354032774} is an apocalyptic number.

256744354032774 is an abundant number, since it is smaller than the sum of its proper divisors (324589751843706).

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

256744354032774 is a wasteful number, since it uses less digits than its factorization.

256744354032774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033162 (or 4033156 counting only the distinct ones).

The product of its (nonzero) digits is 474163200, while the sum is 63.

The spelling of 256744354032774 in words is "two hundred fifty-six trillion, seven hundred forty-four billion, three hundred fifty-four million, thirty-two thousand, seven hundred seventy-four".