256753056251543 has 2 divisors, whose sum is σ = 256753056251544. Its totient is φ = 256753056251542.

The previous prime is 256753056251533. The next prime is 256753056251561. The reversal of 256753056251543 is 345152650357652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256753056251543 - 2¹⁸ = 256753055989399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256753056251513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128376528125771 + 128376528125772.

It is an arithmetic number, because the mean of its divisors is an integer number (128376528125772).

Almost surely, 2^{256753056251543} is an apocalyptic number.

256753056251543 is a deficient number, since it is larger than the sum of its proper divisors (1).

256753056251543 is an equidigital number, since it uses as much as digits as its factorization.

256753056251543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400000, while the sum is 59.

The spelling of 256753056251543 in words is "two hundred fifty-six trillion, seven hundred fifty-three billion, fifty-six million, two hundred fifty-one thousand, five hundred forty-three".