685112183117 has 2 divisors, whose sum is σ = 685112183118. Its totient is φ = 685112183116.

The previous prime is 685112183099. The next prime is 685112183141. The reversal of 685112183117 is 711381211586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677483732836 + 7628450281 = 823094^2 + 87341^2 .

It is a cyclic number.

It is not a de Polignac number, because 685112183117 - 2⁶ = 685112183053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (685112183177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342556091558 + 342556091559.

It is an arithmetic number, because the mean of its divisors is an integer number (342556091559).

Almost surely, 2^685112183117 is an apocalyptic number.

It is an amenable number.

685112183117 is a deficient number, since it is larger than the sum of its proper divisors (1).

685112183117 is an equidigital number, since it uses as much as digits as its factorization.

685112183117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 44.

The spelling of 685112183117 in words is "six hundred eighty-five billion, one hundred twelve million, one hundred eighty-three thousand, one hundred seventeen".