256436523323 has 2 divisors, whose sum is σ = 256436523324. Its totient is φ = 256436523322.

The previous prime is 256436523293. The next prime is 256436523331. The reversal of 256436523323 is 323325634652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256436523323 is a prime.

It is not a weakly prime, because it can be changed into another prime (256436523353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128218261661 + 128218261662.

It is an arithmetic number, because the mean of its divisors is an integer number (128218261662).

Almost surely, 2^256436523323 is an apocalyptic number.

256436523323 is a deficient number, since it is larger than the sum of its proper divisors (1).

256436523323 is an equidigital number, since it uses as much as digits as its factorization.

256436523323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 44.

The spelling of 256436523323 in words is "two hundred fifty-six billion, four hundred thirty-six million, five hundred twenty-three thousand, three hundred twenty-three".