256696598629 has 2 divisors, whose sum is σ = 256696598630. Its totient is φ = 256696598628.

The previous prime is 256696598573. The next prime is 256696598647. The reversal of 256696598629 is 926895696652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141248188900 + 115448409729 = 375830^2 + 339777^2 .

It is a cyclic number.

It is not a de Polignac number, because 256696598629 - 2³⁵ = 222336860261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256696598689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128348299314 + 128348299315.

It is an arithmetic number, because the mean of its divisors is an integer number (128348299315).

Almost surely, 2^256696598629 is an apocalyptic number.

It is an amenable number.

256696598629 is a deficient number, since it is larger than the sum of its proper divisors (1).

256696598629 is an equidigital number, since it uses as much as digits as its factorization.

256696598629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 755827200, while the sum is 73.

The spelling of 256696598629 in words is "two hundred fifty-six billion, six hundred ninety-six million, five hundred ninety-eight thousand, six hundred twenty-nine".