255193077917 has 2 divisors, whose sum is σ = 255193077918. Its totient is φ = 255193077916.

The previous prime is 255193077827. The next prime is 255193077947. The reversal of 255193077917 is 719770391552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237338506276 + 17854571641 = 487174^2 + 133621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255193077917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255193077947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127596538958 + 127596538959.

It is an arithmetic number, because the mean of its divisors is an integer number (127596538959).

Almost surely, 2^255193077917 is an apocalyptic number.

It is an amenable number.

255193077917 is a deficient number, since it is larger than the sum of its proper divisors (1).

255193077917 is an equidigital number, since it uses as much as digits as its factorization.

255193077917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4167450, while the sum is 56.

The spelling of 255193077917 in words is "two hundred fifty-five billion, one hundred ninety-three million, seventy-seven thousand, nine hundred seventeen".