256476312667 has 8 divisors (see below), whose sum is σ = 267639486624. Its totient is φ = 245314141248.

The previous prime is 256476312629. The next prime is 256476312679. The reversal of 256476312667 is 766213674652.

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 a de Polignac number, because none of the positive numbers 2^k-256476312667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256476312607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297703 + ... + 775615.

It is an arithmetic number, because the mean of its divisors is an integer number (33454935828).

Almost surely, 2^256476312667 is an apocalyptic number.

256476312667 is a deficient number, since it is larger than the sum of its proper divisors (11163173957).

256476312667 is a wasteful number, since it uses less digits than its factorization.

256476312667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501269.

The product of its digits is 15240960, while the sum is 55.

The spelling of 256476312667 in words is "two hundred fifty-six billion, four hundred seventy-six million, three hundred twelve thousand, six hundred sixty-seven".