256724640304343 has 2 divisors, whose sum is σ = 256724640304344. Its totient is φ = 256724640304342.

The previous prime is 256724640304243. The next prime is 256724640304361. The reversal of 256724640304343 is 343403046427652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256724640304343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256724640304243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128362320152171 + 128362320152172.

It is an arithmetic number, because the mean of its divisors is an integer number (128362320152172).

Almost surely, 2^{256724640304343} is an apocalyptic number.

256724640304343 is a deficient number, since it is larger than the sum of its proper divisors (1).

256724640304343 is an equidigital number, since it uses as much as digits as its factorization.

256724640304343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34836480, while the sum is 53.

The spelling of 256724640304343 in words is "two hundred fifty-six trillion, seven hundred twenty-four billion, six hundred forty million, three hundred four thousand, three hundred forty-three".