11685369613 has 2 divisors, whose sum is σ = 11685369614. Its totient is φ = 11685369612.

The previous prime is 11685369599. The next prime is 11685369623. The reversal of 11685369613 is 31696358611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11616097284 + 69272329 = 107778^2 + 8323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11685369613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11685369623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5842684806 + 5842684807.

It is an arithmetic number, because the mean of its divisors is an integer number (5842684807).

Almost surely, 2^11685369613 is an apocalyptic number.

It is an amenable number.

11685369613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11685369613 is an equidigital number, since it uses as much as digits as its factorization.

11685369613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The spelling of 11685369613 in words is "eleven billion, six hundred eighty-five million, three hundred sixty-nine thousand, six hundred thirteen".