256823890047 has 12 divisors (see below), whose sum is σ = 387096878064. Its totient is φ = 163771755840.

The previous prime is 256823890039. The next prime is 256823890073. The reversal of 256823890047 is 740098328652.

256823890047 is a `hidden beast` number, since 2 + 568 + 2 + 38 + 9 + 0 + 0 + 47 = 666.

It is not a de Polignac number, because 256823890047 - 2³ = 256823890039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256823889975 and 256823890002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256823890087) 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, 620347354 + ... + 620347767.

It is an arithmetic number, because the mean of its divisors is an integer number (32258073172).

Almost surely, 2^256823890047 is an apocalyptic number.

256823890047 is a deficient number, since it is larger than the sum of its proper divisors (130272988017).

256823890047 is a wasteful number, since it uses less digits than its factorization.

256823890047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240695150 (or 1240695147 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 256823890047 in words is "two hundred fifty-six billion, eight hundred twenty-three million, eight hundred ninety thousand, forty-seven".