256762808249 has 2 divisors, whose sum is σ = 256762808250. Its totient is φ = 256762808248.

The previous prime is 256762808243. The next prime is 256762808287. The reversal of 256762808249 is 942808267652.

It is a happy number.

256762808249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145828515625 + 110934292624 = 381875^2 + 333068^2 .

It is a cyclic number.

It is not a de Polignac number, because 256762808249 - 2²⁰ = 256761759673 is a prime.

It is not a weakly prime, because it can be changed into another prime (256762808243) 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, 128381404124 + 128381404125.

It is an arithmetic number, because the mean of its divisors is an integer number (128381404125).

Almost surely, 2^256762808249 is an apocalyptic number.

It is an amenable number.

256762808249 is a deficient number, since it is larger than the sum of its proper divisors (1).

256762808249 is an equidigital number, since it uses as much as digits as its factorization.

256762808249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 256762808249 in words is "two hundred fifty-six billion, seven hundred sixty-two million, eight hundred eight thousand, two hundred forty-nine".