256734207376203 has 16 divisors (see below), whose sum is σ = 351589681529120. Its totient is φ = 166518112628736.

The previous prime is 256734207376177. The next prime is 256734207376223. The reversal of 256734207376203 is 302673702437652.

It is not a de Polignac number, because 256734207376203 - 2⁶ = 256734207376139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256734207376223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83087350 + ... + 86121867.

It is an arithmetic number, because the mean of its divisors is an integer number (21974355095570).

Almost surely, 2^{256734207376203} is an apocalyptic number.

256734207376203 is a deficient number, since it is larger than the sum of its proper divisors (94855474152917).

256734207376203 is a wasteful number, since it uses less digits than its factorization.

256734207376203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169222926.

The product of its (nonzero) digits is 53343360, while the sum is 57.

The spelling of 256734207376203 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, two hundred seven million, three hundred seventy-six thousand, two hundred three".