256678433142274 has 32 divisors (see below), whose sum is σ = 457778167769664. Its totient is φ = 106399687500480.

The previous prime is 256678433142239. The next prime is 256678433142281. The reversal of 256678433142274 is 472241334876652.

It is a happy 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, 5406464449 + ... + 5406511924.

It is an arithmetic number, because the mean of its divisors is an integer number (14305567742802).

Almost surely, 2^{256678433142274} is an apocalyptic number.

256678433142274 is a deficient number, since it is larger than the sum of its proper divisors (201099734627390).

256678433142274 is a wasteful number, since it uses less digits than its factorization.

256678433142274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10812976482.

The product of its digits is 325140480, while the sum is 64.

The spelling of 256678433142274 in words is "two hundred fifty-six trillion, six hundred seventy-eight billion, four hundred thirty-three million, one hundred forty-two thousand, two hundred seventy-four".