256205042004629 has 2 divisors, whose sum is σ = 256205042004630. Its totient is φ = 256205042004628.

The previous prime is 256205042004539. The next prime is 256205042004647. The reversal of 256205042004629 is 926400240502652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171822023448100 + 84383018556529 = 13108090^2 + 9186023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256205042004629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256205042004649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128102521002314 + 128102521002315.

It is an arithmetic number, because the mean of its divisors is an integer number (128102521002315).

Almost surely, 2^{256205042004629} is an apocalyptic number.

It is an amenable number.

256205042004629 is a deficient number, since it is larger than the sum of its proper divisors (1).

256205042004629 is an equidigital number, since it uses as much as digits as its factorization.

256205042004629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 256205042004629 in words is "two hundred fifty-six trillion, two hundred five billion, forty-two million, four thousand, six hundred twenty-nine".