256762575672091 has 2 divisors, whose sum is σ = 256762575672092. Its totient is φ = 256762575672090.

The previous prime is 256762575672059. The next prime is 256762575672121. The reversal of 256762575672091 is 190276575267652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256762575672091 - 2⁵ = 256762575672059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256762575672091.

It is not a weakly prime, because it can be changed into another prime (256762578672091) 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 as a sum of consecutive naturals, namely, 128381287836045 + 128381287836046.

It is an arithmetic number, because the mean of its divisors is an integer number (128381287836046).

Almost surely, 2^{256762575672091} is an apocalyptic number.

256762575672091 is a deficient number, since it is larger than the sum of its proper divisors (1).

256762575672091 is an equidigital number, since it uses as much as digits as its factorization.

256762575672091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792000, while the sum is 70.

The spelling of 256762575672091 in words is "two hundred fifty-six trillion, seven hundred sixty-two billion, five hundred seventy-five million, six hundred seventy-two thousand, ninety-one".