8161974884 has 18 divisors (see below), whose sum is σ = 16615449270. Its totient is φ = 3497989152.

The previous prime is 8161974881. The next prime is 8161974889. The reversal of 8161974884 is 4884791618.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8096040484 + 65934400 = 89978^2 + 8120^2 .

It is not an unprimeable number, because it can be changed into a prime (8161974881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20821169 + ... + 20821560.

It is an arithmetic number, because the mean of its divisors is an integer number (923080515).

Almost surely, 2^8161974884 is an apocalyptic number.

It is an amenable number.

8161974884 is an abundant number, since it is smaller than the sum of its proper divisors (8453474386).

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

8161974884 is a wasteful number, since it uses less digits than its factorization.

8161974884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41642747 (or 41642738 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 56.

The square root of 8161974884 is about 90343.6488304518. The cubic root of 8161974884 is about 2013.4078213040.

The spelling of 8161974884 in words is "eight billion, one hundred sixty-one million, nine hundred seventy-four thousand, eight hundred eighty-four".