256613027043343 has 2 divisors, whose sum is σ = 256613027043344. Its totient is φ = 256613027043342.

The previous prime is 256613027043203. The next prime is 256613027043353. The reversal of 256613027043343 is 343340720316652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256613027043343 - 2²¹ = 256613024946191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256613027043353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128306513521671 + 128306513521672.

It is an arithmetic number, because the mean of its divisors is an integer number (128306513521672).

Almost surely, 2^{256613027043343} is an apocalyptic number.

256613027043343 is a deficient number, since it is larger than the sum of its proper divisors (1).

256613027043343 is an equidigital number, since it uses as much as digits as its factorization.

256613027043343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 49.

Adding to 256613027043343 its reverse (343340720316652), we get a palindrome (599953747359995).

The spelling of 256613027043343 in words is "two hundred fifty-six trillion, six hundred thirteen billion, twenty-seven million, forty-three thousand, three hundred forty-three".