6818161113 has 12 divisors (see below), whose sum is σ = 10009905828. Its totient is φ = 4470924960.

The previous prime is 6818161081. The next prime is 6818161139. The reversal of 6818161113 is 3111618186.

It can be written as a sum of positive squares in 2 ways, for example, as 1977758784 + 4840402329 = 44472^2 + 69573^2 .

It is not a de Polignac number, because 6818161113 - 2⁵ = 6818161081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6818161183) 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 11 ways as a sum of consecutive naturals, for example, 6209070 + ... + 6210167.

It is an arithmetic number, because the mean of its divisors is an integer number (834158819).

Almost surely, 2^6818161113 is an apocalyptic number.

It is an amenable number.

6818161113 is a deficient number, since it is larger than the sum of its proper divisors (3191744715).

6818161113 is a wasteful number, since it uses less digits than its factorization.

6818161113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12419304 (or 12419301 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 6818161113 is about 82572.1570082797. The cubic root of 6818161113 is about 1896.2215873917.

Adding to 6818161113 its reverse (3111618186), we get a palindrome (9929779299).

The spelling of 6818161113 in words is "six billion, eight hundred eighteen million, one hundred sixty-one thousand, one hundred thirteen".