13117888845 has 20 divisors (see below), whose sum is σ = 23515031100. Its totient is φ = 6996207168.

The previous prime is 13117888843. The next prime is 13117888853. The reversal of 13117888845 is 54888871131.

13117888845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9806346729 + 3311542116 = 99027^2 + 57546^2 .

It is not a de Polignac number, because 13117888845 - 2¹ = 13117888843 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13117888791 and 13117888800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13117888843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16194520 + ... + 16195329.

It is an arithmetic number, because the mean of its divisors is an integer number (1175751555).

Almost surely, 2^13117888845 is an apocalyptic number.

13117888845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13117888845 is a deficient number, since it is larger than the sum of its proper divisors (10397142255).

13117888845 is an equidigital number, since it uses as much as digits as its factorization.

13117888845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32389866 (or 32389857 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 54.

The spelling of 13117888845 in words is "thirteen billion, one hundred seventeen million, eight hundred eighty-eight thousand, eight hundred forty-five".