255429974717 has 2 divisors, whose sum is σ = 255429974718. Its totient is φ = 255429974716.

The previous prime is 255429974699. The next prime is 255429974797. The reversal of 255429974717 is 717479924552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240870897796 + 14559076921 = 490786^2 + 120661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255429974717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255429974717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255429974797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127714987358 + 127714987359.

It is an arithmetic number, because the mean of its divisors is an integer number (127714987359).

Almost surely, 2^255429974717 is an apocalyptic number.

It is an amenable number.

255429974717 is a deficient number, since it is larger than the sum of its proper divisors (1).

255429974717 is an equidigital number, since it uses as much as digits as its factorization.

255429974717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44452800, while the sum is 62.

The spelling of 255429974717 in words is "two hundred fifty-five billion, four hundred twenty-nine million, nine hundred seventy-four thousand, seven hundred seventeen".