256444051439 has 2 divisors, whose sum is σ = 256444051440. Its totient is φ = 256444051438.

The previous prime is 256444051429. The next prime is 256444051469. The reversal of 256444051439 is 934150444652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256444051439 - 2⁸ = 256444051183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256444051393 and 256444051402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256444051429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128222025719 + 128222025720.

It is an arithmetic number, because the mean of its divisors is an integer number (128222025720).

Almost surely, 2^256444051439 is an apocalyptic number.

256444051439 is a deficient number, since it is larger than the sum of its proper divisors (1).

256444051439 is an equidigital number, since it uses as much as digits as its factorization.

256444051439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 256444051439 in words is "two hundred fifty-six billion, four hundred forty-four million, fifty-one thousand, four hundred thirty-nine".