8181662118 has 16 divisors (see below), whose sum is σ = 18700942080. Its totient is φ = 2337617736.

The previous prime is 8181662117. The next prime is 8181662129. The reversal of 8181662118 is 8112661818.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 194801479 = 8181662118 / (8 + 1 + 8 + 1 + 6 + 6 + 2 + 1 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 8181662118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181662113) 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 7 ways as a sum of consecutive naturals, for example, 97400698 + ... + 97400781.

It is an arithmetic number, because the mean of its divisors is an integer number (1168808880).

Almost surely, 2^8181662118 is an apocalyptic number.

8181662118 is an abundant number, since it is smaller than the sum of its proper divisors (10519279962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8181662118 is a wasteful number, since it uses less digits than its factorization.

8181662118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194801491.

The product of its digits is 36864, while the sum is 42.

The square root of 8181662118 is about 90452.5406940015. The cubic root of 8181662118 is about 2015.0253466344.

The spelling of 8181662118 in words is "eight billion, one hundred eighty-one million, six hundred sixty-two thousand, one hundred eighteen".