13138813808685 has 40 divisors (see below), whose sum is σ = 23553229049856. Its totient is φ = 7007162450400.

The previous prime is 13138813808657. The next prime is 13138813808689. The reversal of 13138813808685 is 58680831883131.

13138813808685 is a `hidden beast` number, since 1 + 313 + 88 + 13 + 80 + 86 + 85 = 666.

It is not a de Polignac number, because 13138813808685 - 2¹⁰ = 13138813807661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138813808689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13931860 + ... + 14845010.

Almost surely, 2^{13138813808685} is an apocalyptic number.

13138813808685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13138813808685 is a deficient number, since it is larger than the sum of its proper divisors (10414415241171).

13138813808685 is an equidigital number, since it uses as much as digits as its factorization.

13138813808685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948695 (or 948686 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The spelling of 13138813808685 in words is "thirteen trillion, one hundred thirty-eight billion, eight hundred thirteen million, eight hundred eight thousand, six hundred eighty-five".