256571278905478 has 8 divisors (see below), whose sum is σ = 384857002427472. Its totient is φ = 128285611429656.

The previous prime is 256571278905457. The next prime is 256571278905481. The reversal of 256571278905478 is 874509872175652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396076 + ... + 22656112.

It is an arithmetic number, because the mean of its divisors is an integer number (48107125303434).

Almost surely, 2^{256571278905478} is an apocalyptic number.

256571278905478 is a deficient number, since it is larger than the sum of its proper divisors (128285723521994).

256571278905478 is a wasteful number, since it uses less digits than its factorization.

256571278905478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28023086.

The product of its (nonzero) digits is 2370816000, while the sum is 76.

The spelling of 256571278905478 in words is "two hundred fifty-six trillion, five hundred seventy-one billion, two hundred seventy-eight million, nine hundred five thousand, four hundred seventy-eight".