256734145452679 has 2 divisors, whose sum is σ = 256734145452680. Its totient is φ = 256734145452678.

The previous prime is 256734145452619. The next prime is 256734145452683. The reversal of 256734145452679 is 976254541437652.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256734145452679 - 2¹⁵ = 256734145419911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256734145452619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128367072726339 + 128367072726340.

It is an arithmetic number, because the mean of its divisors is an integer number (128367072726340).

Almost surely, 2^{256734145452679} is an apocalyptic number.

256734145452679 is a deficient number, since it is larger than the sum of its proper divisors (1).

256734145452679 is an equidigital number, since it uses as much as digits as its factorization.

256734145452679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096000, while the sum is 70.

The spelling of 256734145452679 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, one hundred forty-five million, four hundred fifty-two thousand, six hundred seventy-nine".