255519179868949 has 2 divisors, whose sum is σ = 255519179868950. Its totient is φ = 255519179868948.

The previous prime is 255519179868893. The next prime is 255519179869001. The reversal of 255519179868949 is 949868971915552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202187269632049 + 53331910236900 = 14219257^2 + 7302870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255519179868949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255519179868949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255519179848949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127759589934474 + 127759589934475.

It is an arithmetic number, because the mean of its divisors is an integer number (127759589934475).

Almost surely, 2^{255519179868949} is an apocalyptic number.

It is an amenable number.

255519179868949 is a deficient number, since it is larger than the sum of its proper divisors (1).

255519179868949 is an equidigital number, since it uses as much as digits as its factorization.

255519179868949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968000, while the sum is 88.

The spelling of 255519179868949 in words is "two hundred fifty-five trillion, five hundred nineteen billion, one hundred seventy-nine million, eight hundred sixty-eight thousand, nine hundred forty-nine".