255785462217 has 12 divisors (see below), whose sum is σ = 370801712580. Its totient is φ = 169908031008.

The previous prime is 255785462201. The next prime is 255785462221. The reversal of 255785462217 is 712264587552.

It is a happy number.

255785462217 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 8 + 5 + 4 + 622 + 1 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 79062754761 + 176722707456 = 281181^2 + 420384^2 .

It is not a de Polignac number, because 255785462217 - 2⁴ = 255785462201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255785462287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51298242 + ... + 51303227.

It is an arithmetic number, because the mean of its divisors is an integer number (30900142715).

Almost surely, 2^255785462217 is an apocalyptic number.

It is an amenable number.

255785462217 is a deficient number, since it is larger than the sum of its proper divisors (115016250363).

255785462217 is a wasteful number, since it uses less digits than its factorization.

255785462217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102601752 (or 102601749 counting only the distinct ones).

The product of its digits is 9408000, while the sum is 54.

The spelling of 255785462217 in words is "two hundred fifty-five billion, seven hundred eighty-five million, four hundred sixty-two thousand, two hundred seventeen".