8181995980 has 48 divisors (see below), whose sum is σ = 17468861760. Its totient is φ = 3218432000.

The previous prime is 8181995963. The next prime is 8181996007. The reversal of 8181995980 is 895991818.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562236 + ... + 576604.

It is an arithmetic number, because the mean of its divisors is an integer number (363934620).

Almost surely, 2^8181995980 is an apocalyptic number.

It is an amenable number.

8181995980 is an abundant number, since it is smaller than the sum of its proper divisors (9286865780).

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

8181995980 is a wasteful number, since it uses less digits than its factorization.

8181995980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14850 (or 14848 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 58.

The square root of 8181995980 is about 90454.3861844189. The cubic root of 8181995980 is about 2015.0527547263.

The spelling of 8181995980 in words is "eight billion, one hundred eighty-one million, nine hundred ninety-five thousand, nine hundred eighty".