255891373729 has 2 divisors, whose sum is σ = 255891373730. Its totient is φ = 255891373728.

The previous prime is 255891373679. The next prime is 255891373747. The reversal of 255891373729 is 927373198552.

255891373729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255810373729 + 81000000 = 505777^2 + 9000^2 .

It is a cyclic number.

It is not a de Polignac number, because 255891373729 - 2¹³ = 255891365537 is a prime.

It is not a weakly prime, because it can be changed into another prime (255891373799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127945686864 + 127945686865.

It is an arithmetic number, because the mean of its divisors is an integer number (127945686865).

Almost surely, 2^255891373729 is an apocalyptic number.

It is an amenable number.

255891373729 is a deficient number, since it is larger than the sum of its proper divisors (1).

255891373729 is an equidigital number, since it uses as much as digits as its factorization.

255891373729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28576800, while the sum is 61.

The spelling of 255891373729 in words is "two hundred fifty-five billion, eight hundred ninety-one million, three hundred seventy-three thousand, seven hundred twenty-nine".