256676028847 has 12 divisors (see below), whose sum is σ = 298595010720. Its totient is φ = 219998673216.

The previous prime is 256676028803. The next prime is 256676028859. The reversal of 256676028847 is 748820676652.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-256676028847 is a prime.

It is a super-2 number, since 2×256676028847² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256676028887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1212154 + ... + 1408072.

It is an arithmetic number, because the mean of its divisors is an integer number (24882917560).

Almost surely, 2^256676028847 is an apocalyptic number.

256676028847 is a deficient number, since it is larger than the sum of its proper divisors (41918981873).

256676028847 is a wasteful number, since it uses less digits than its factorization.

256676028847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222670 (or 222663 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 61.

The spelling of 256676028847 in words is "two hundred fifty-six billion, six hundred seventy-six million, twenty-eight thousand, eight hundred forty-seven".