256270667173 has 2 divisors, whose sum is σ = 256270667174. Its totient is φ = 256270667172.

The previous prime is 256270667101. The next prime is 256270667203. The reversal of 256270667173 is 371766072652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182676743649 + 73593923524 = 427407^2 + 271282^2 .

It is a cyclic number.

It is not a de Polignac number, because 256270667173 - 2¹⁷ = 256270536101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256270667173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256270664173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128135333586 + 128135333587.

It is an arithmetic number, because the mean of its divisors is an integer number (128135333587).

Almost surely, 2^256270667173 is an apocalyptic number.

It is an amenable number.

256270667173 is a deficient number, since it is larger than the sum of its proper divisors (1).

256270667173 is an equidigital number, since it uses as much as digits as its factorization.

256270667173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4445280, while the sum is 52.

The spelling of 256270667173 in words is "two hundred fifty-six billion, two hundred seventy million, six hundred sixty-seven thousand, one hundred seventy-three".