8160991880 has 64 divisors (see below), whose sum is σ = 18512221680. Its totient is φ = 3237811200.

The previous prime is 8160991879. The next prime is 8160991897. The reversal of 8160991880 is 881990618.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2954792164 + 5206199716 = 54358^2 + 72154^2 .

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, 5908790 + ... + 5910170.

Almost surely, 2^8160991880 is an apocalyptic number.

It is an amenable number.

8160991880 is an abundant number, since it is smaller than the sum of its proper divisors (10351229800).

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

8160991880 is a wasteful number, since it uses less digits than its factorization.

8160991880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490 (or 2486 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 8160991880 is about 90338.2083063418. The cubic root of 8160991880 is about 2013.3269884405.

The spelling of 8160991880 in words is "eight billion, one hundred sixty million, nine hundred ninety-one thousand, eight hundred eighty".