256420676167 has 2 divisors, whose sum is σ = 256420676168. Its totient is φ = 256420676166.

The previous prime is 256420676137. The next prime is 256420676201. The reversal of 256420676167 is 761676024652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256420676167 - 2¹⁵ = 256420643399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256420676107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128210338083 + 128210338084.

It is an arithmetic number, because the mean of its divisors is an integer number (128210338084).

Almost surely, 2^256420676167 is an apocalyptic number.

256420676167 is a deficient number, since it is larger than the sum of its proper divisors (1).

256420676167 is an equidigital number, since it uses as much as digits as its factorization.

256420676167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 256420676167 in words is "two hundred fifty-six billion, four hundred twenty million, six hundred seventy-six thousand, one hundred sixty-seven".