256476855 has 8 divisors (see below), whose sum is σ = 410362992. Its totient is φ = 136787648.

The previous prime is 256476833. The next prime is 256476863. The reversal of 256476855 is 558674652.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 256476855 - 2¹⁰ = 256475831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8549214 + ... + 8549243.

It is an arithmetic number, because the mean of its divisors is an integer number (51295374).

Almost surely, 2^256476855 is an apocalyptic number.

256476855 is a deficient number, since it is larger than the sum of its proper divisors (153886137).

256476855 is a wasteful number, since it uses less digits than its factorization.

256476855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17098465.

The product of its digits is 2016000, while the sum is 48.

The square root of 256476855 is about 16014.8947857924. The cubic root of 256476855 is about 635.3544263155.

The spelling of 256476855 in words is "two hundred fifty-six million, four hundred seventy-six thousand, eight hundred fifty-five".