256352874629 has 2 divisors, whose sum is σ = 256352874630. Its totient is φ = 256352874628.

The previous prime is 256352874593. The next prime is 256352874641. The reversal of 256352874629 is 926478253652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222286789729 + 34066084900 = 471473^2 + 184570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256352874629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256352874649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128176437314 + 128176437315.

It is an arithmetic number, because the mean of its divisors is an integer number (128176437315).

Almost surely, 2^256352874629 is an apocalyptic number.

It is an amenable number.

256352874629 is a deficient number, since it is larger than the sum of its proper divisors (1).

256352874629 is an equidigital number, since it uses as much as digits as its factorization.

256352874629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 59.

The spelling of 256352874629 in words is "two hundred fifty-six billion, three hundred fifty-two million, eight hundred seventy-four thousand, six hundred twenty-nine".