685112183617 has 2 divisors, whose sum is σ = 685112183618. Its totient is φ = 685112183616.

The previous prime is 685112183603. The next prime is 685112183641. The reversal of 685112183617 is 716381211586.

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., 575710667536 + 109401516081 = 758756^2 + 330759^2 .

It is a cyclic number.

It is not a de Polignac number, because 685112183617 - 2³⁵ = 650752445249 is a prime.

It is not a weakly prime, because it can be changed into another prime (685112183117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342556091808 + 342556091809.

It is an arithmetic number, because the mean of its divisors is an integer number (342556091809).

Almost surely, 2^685112183617 is an apocalyptic number.

It is an amenable number.

685112183617 is a deficient number, since it is larger than the sum of its proper divisors (1).

685112183617 is an equidigital number, since it uses as much as digits as its factorization.

685112183617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 49.

The spelling of 685112183617 in words is "six hundred eighty-five billion, one hundred twelve million, one hundred eighty-three thousand, six hundred seventeen".