256902493723 has 2 divisors, whose sum is σ = 256902493724. Its totient is φ = 256902493722.

The previous prime is 256902493667. The next prime is 256902493753. The reversal of 256902493723 is 327394209652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256902493723 is a prime.

It is not a weakly prime, because it can be changed into another prime (256902493753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128451246861 + 128451246862.

It is an arithmetic number, because the mean of its divisors is an integer number (128451246862).

Almost surely, 2^256902493723 is an apocalyptic number.

256902493723 is a deficient number, since it is larger than the sum of its proper divisors (1).

256902493723 is an equidigital number, since it uses as much as digits as its factorization.

256902493723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The spelling of 256902493723 in words is "two hundred fifty-six billion, nine hundred two million, four hundred ninety-three thousand, seven hundred twenty-three".