12170685757 has 2 divisors, whose sum is σ = 12170685758. Its totient is φ = 12170685756.

The previous prime is 12170685749. The next prime is 12170685803. The reversal of 12170685757 is 75758607121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12094280676 + 76405081 = 109974^2 + 8741^2 .

It is a cyclic number.

It is not a de Polignac number, because 12170685757 - 2³ = 12170685749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12170685757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12170685707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6085342878 + 6085342879.

It is an arithmetic number, because the mean of its divisors is an integer number (6085342879).

Almost surely, 2^12170685757 is an apocalyptic number.

It is an amenable number.

12170685757 is a deficient number, since it is larger than the sum of its proper divisors (1).

12170685757 is an equidigital number, since it uses as much as digits as its factorization.

12170685757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 823200, while the sum is 49.

The spelling of 12170685757 in words is "twelve billion, one hundred seventy million, six hundred eighty-five thousand, seven hundred fifty-seven".