8161884678 has 16 divisors (see below), whose sum is σ = 16721910576. Its totient is φ = 2654271360.

The previous prime is 8161884629. The next prime is 8161884713. The reversal of 8161884678 is 8764881618.

It is a super-2 number, since 2×8161884678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16588951 + ... + 16589442.

It is an arithmetic number, because the mean of its divisors is an integer number (1045119411).

Almost surely, 2^8161884678 is an apocalyptic number.

8161884678 is an abundant number, since it is smaller than the sum of its proper divisors (8560025898).

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

8161884678 is a wasteful number, since it uses less digits than its factorization.

8161884678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33178439.

The product of its digits is 4128768, while the sum is 57.

The square root of 8161884678 is about 90343.1495908793. The cubic root of 8161884678 is about 2013.4004038943.

The spelling of 8161884678 in words is "eight billion, one hundred sixty-one million, eight hundred eighty-four thousand, six hundred seventy-eight".