256838457833 has 64 divisors (see below), whose sum is σ = 288947699712. Its totient is φ = 227472421440.

The previous prime is 256838457803. The next prime is 256838457857. The reversal of 256838457833 is 338754838652.

It is not a de Polignac number, because 256838457833 - 2⁶ = 256838457769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256838457803) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 297610760 + ... + 297611622.

It is an arithmetic number, because the mean of its divisors is an integer number (4514807808).

Almost surely, 2^256838457833 is an apocalyptic number.

256838457833 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

256838457833 is a deficient number, since it is larger than the sum of its proper divisors (32109241879).

256838457833 is a wasteful number, since it uses less digits than its factorization.

256838457833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154.

The product of its digits is 116121600, while the sum is 62.

The spelling of 256838457833 in words is "two hundred fifty-six billion, eight hundred thirty-eight million, four hundred fifty-seven thousand, eight hundred thirty-three".