255998951413 has 2 divisors, whose sum is σ = 255998951414. Its totient is φ = 255998951412.

The previous prime is 255998951401. The next prime is 255998951431. The reversal of 255998951413 is 314159899552.

Together with next prime (255998951431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254538412324 + 1460539089 = 504518^2 + 38217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255998951413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255998951113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127999475706 + 127999475707.

It is an arithmetic number, because the mean of its divisors is an integer number (127999475707).

Almost surely, 2^255998951413 is an apocalyptic number.

It is an amenable number.

255998951413 is a deficient number, since it is larger than the sum of its proper divisors (1).

255998951413 is an equidigital number, since it uses as much as digits as its factorization.

255998951413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496000, while the sum is 61.

The spelling of 255998951413 in words is "two hundred fifty-five billion, nine hundred ninety-eight million, nine hundred fifty-one thousand, four hundred thirteen".