256525442240167 has 2 divisors, whose sum is σ = 256525442240168. Its totient is φ = 256525442240166.

The previous prime is 256525442240117. The next prime is 256525442240173. The reversal of 256525442240167 is 761042244525652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256525442240167 - 2³⁵ = 256491082501799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256525442240117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128262721120083 + 128262721120084.

It is an arithmetic number, because the mean of its divisors is an integer number (128262721120084).

Almost surely, 2^{256525442240167} is an apocalyptic number.

256525442240167 is a deficient number, since it is larger than the sum of its proper divisors (1).

256525442240167 is an equidigital number, since it uses as much as digits as its factorization.

256525442240167 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256000, while the sum is 55.

The spelling of 256525442240167 in words is "two hundred fifty-six trillion, five hundred twenty-five billion, four hundred forty-two million, two hundred forty thousand, one hundred sixty-seven".