256743504214303 has 2 divisors, whose sum is σ = 256743504214304. Its totient is φ = 256743504214302.

The previous prime is 256743504214283. The next prime is 256743504214343. The reversal of 256743504214303 is 303412405347652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256743504214303 - 2²⁹ = 256742967343391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256743504214343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128371752107151 + 128371752107152.

It is an arithmetic number, because the mean of its divisors is an integer number (128371752107152).

Almost surely, 2^{256743504214303} is an apocalyptic number.

256743504214303 is a deficient number, since it is larger than the sum of its proper divisors (1).

256743504214303 is an equidigital number, since it uses as much as digits as its factorization.

256743504214303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 49.

The spelling of 256743504214303 in words is "two hundred fifty-six trillion, seven hundred forty-three billion, five hundred four million, two hundred fourteen thousand, three hundred three".