256519295413 has 2 divisors, whose sum is σ = 256519295414. Its totient is φ = 256519295412.

The previous prime is 256519295407. The next prime is 256519295429. The reversal of 256519295413 is 314592915652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256175675044 + 343620369 = 506138^2 + 18537^2 .

It is a cyclic number.

It is not a de Polignac number, because 256519295413 - 2⁹ = 256519294901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256519295213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128259647706 + 128259647707.

It is an arithmetic number, because the mean of its divisors is an integer number (128259647707).

Almost surely, 2^256519295413 is an apocalyptic number.

It is an amenable number.

256519295413 is a deficient number, since it is larger than the sum of its proper divisors (1).

256519295413 is an equidigital number, since it uses as much as digits as its factorization.

256519295413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916000, while the sum is 52.

The spelling of 256519295413 in words is "two hundred fifty-six billion, five hundred nineteen million, two hundred ninety-five thousand, four hundred thirteen".