256203431167 has 2 divisors, whose sum is σ = 256203431168. Its totient is φ = 256203431166.

The previous prime is 256203431137. The next prime is 256203431177. The reversal of 256203431167 is 761134302652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256203431167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256203431137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128101715583 + 128101715584.

It is an arithmetic number, because the mean of its divisors is an integer number (128101715584).

Almost surely, 2^256203431167 is an apocalyptic number.

256203431167 is a deficient number, since it is larger than the sum of its proper divisors (1).

256203431167 is an equidigital number, since it uses as much as digits as its factorization.

256203431167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 256203431167 in words is "two hundred fifty-six billion, two hundred three million, four hundred thirty-one thousand, one hundred sixty-seven".