255657688243 has 2 divisors, whose sum is σ = 255657688244. Its totient is φ = 255657688242.

The previous prime is 255657688189. The next prime is 255657688291. The reversal of 255657688243 is 342886756552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255657688243 - 2¹³ = 255657680051 is a prime.

It is not a weakly prime, because it can be changed into another prime (255657088243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127828844121 + 127828844122.

It is an arithmetic number, because the mean of its divisors is an integer number (127828844122).

Almost surely, 2^255657688243 is an apocalyptic number.

255657688243 is a deficient number, since it is larger than the sum of its proper divisors (1).

255657688243 is an equidigital number, since it uses as much as digits as its factorization.

255657688243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768000, while the sum is 61.

The spelling of 255657688243 in words is "two hundred fifty-five billion, six hundred fifty-seven million, six hundred eighty-eight thousand, two hundred forty-three".