255206743249 has 2 divisors, whose sum is σ = 255206743250. Its totient is φ = 255206743248.

The previous prime is 255206743247. The next prime is 255206743271. The reversal of 255206743249 is 942347602552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184442763024 + 70763980225 = 429468^2 + 266015^2 .

It is a cyclic number.

It is not a de Polignac number, because 255206743249 - 2¹ = 255206743247 is a prime.

It is a super-2 number, since 2×255206743249² (a number of 24 digits) contains 22 as substring.

Together with 255206743247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255206743247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127603371624 + 127603371625.

It is an arithmetic number, because the mean of its divisors is an integer number (127603371625).

Almost surely, 2^255206743249 is an apocalyptic number.

It is an amenable number.

255206743249 is a deficient number, since it is larger than the sum of its proper divisors (1).

255206743249 is an equidigital number, since it uses as much as digits as its factorization.

255206743249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 255206743249 in words is "two hundred fifty-five billion, two hundred six million, seven hundred forty-three thousand, two hundred forty-nine".