256743503712799 has 2 divisors, whose sum is σ = 256743503712800. Its totient is φ = 256743503712798.

The previous prime is 256743503712767. The next prime is 256743503712821. The reversal of 256743503712799 is 997217305347652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256743503712799 - 2⁵ = 256743503712767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256743503712749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128371751856399 + 128371751856400.

It is an arithmetic number, because the mean of its divisors is an integer number (128371751856400).

Almost surely, 2^{256743503712799} is an apocalyptic number.

256743503712799 is a deficient number, since it is larger than the sum of its proper divisors (1).

256743503712799 is an equidigital number, since it uses as much as digits as its factorization.

256743503712799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600112800, while the sum is 70.

The spelling of 256743503712799 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred three million, seven hundred twelve thousand, seven hundred ninety-nine".