256420036274 has 4 divisors (see below), whose sum is σ = 384630054414. Its totient is φ = 128210018136.

The previous prime is 256420036261. The next prime is 256420036321. The reversal of 256420036274 is 472630024652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 164789719249 + 91630317025 = 405943^2 + 302705^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64105009067 + ... + 64105009070.

Almost surely, 2^256420036274 is an apocalyptic number.

256420036274 is a deficient number, since it is larger than the sum of its proper divisors (128210018140).

256420036274 is a wasteful number, since it uses less digits than its factorization.

256420036274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128210018139.

The product of its (nonzero) digits is 483840, while the sum is 41.

The spelling of 256420036274 in words is "two hundred fifty-six billion, four hundred twenty million, thirty-six thousand, two hundred seventy-four".