85461678317 has 2 divisors, whose sum is σ = 85461678318. Its totient is φ = 85461678316.

The previous prime is 85461678287. The next prime is 85461678343. The reversal of 85461678317 is 71387616458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56767351081 + 28694327236 = 238259^2 + 169394^2 .

It is a cyclic number.

It is not a de Polignac number, because 85461678317 - 2²⁰ = 85460629741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85461678397) 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, 42730839158 + 42730839159.

It is an arithmetic number, because the mean of its divisors is an integer number (42730839159).

Almost surely, 2^85461678317 is an apocalyptic number.

It is an amenable number.

85461678317 is a deficient number, since it is larger than the sum of its proper divisors (1).

85461678317 is an equidigital number, since it uses as much as digits as its factorization.

85461678317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6773760, while the sum is 56.

The spelling of 85461678317 in words is "eighty-five billion, four hundred sixty-one million, six hundred seventy-eight thousand, three hundred seventeen".