8181819180 has 96 divisors (see below), whose sum is σ = 25470244800. Its totient is φ = 2180473344.

The previous prime is 8181819179. The next prime is 8181819193. The reversal of 8181819180 is 819181818.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1124434 + ... + 1131686.

It is an arithmetic number, because the mean of its divisors is an integer number (265315050).

Almost surely, 2^8181819180 is an apocalyptic number.

It is an amenable number.

8181819180 is an abundant number, since it is smaller than the sum of its proper divisors (17288425620).

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

8181819180 is a wasteful number, since it uses less digits than its factorization.

8181819180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9360 (or 9352 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 45.

The square root of 8181819180 is about 90453.4088909865. The cubic root of 8181819180 is about 2015.0382405868.

The spelling of 8181819180 in words is "eight billion, one hundred eighty-one million, eight hundred nineteen thousand, one hundred eighty".