85456118717 has 2 divisors, whose sum is σ = 85456118718. Its totient is φ = 85456118716.

The previous prime is 85456118647. The next prime is 85456118801. The reversal of 85456118717 is 71781165458.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82572321316 + 2883797401 = 287354^2 + 53701^2 .

It is a cyclic number.

It is not a de Polignac number, because 85456118717 - 2²⁴ = 85439341501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85456118617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42728059358 + 42728059359.

It is an arithmetic number, because the mean of its divisors is an integer number (42728059359).

Almost surely, 2^85456118717 is an apocalyptic number.

It is an amenable number.

85456118717 is a deficient number, since it is larger than the sum of its proper divisors (1).

85456118717 is an equidigital number, since it uses as much as digits as its factorization.

85456118717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1881600, while the sum is 53.

The spelling of 85456118717 in words is "eighty-five billion, four hundred fifty-six million, one hundred eighteen thousand, seven hundred seventeen".