8181732168 has 48 divisors (see below), whose sum is σ = 22270248000. Its totient is φ = 2713534560.

The previous prime is 8181732161. The next prime is 8181732173. The reversal of 8181732168 is 8612371818.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8181732161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271188 + ... + 299843.

It is an arithmetic number, because the mean of its divisors is an integer number (463963500).

Almost surely, 2^8181732168 is an apocalyptic number.

It is an amenable number.

8181732168 is an abundant number, since it is smaller than the sum of its proper divisors (14088515832).

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

8181732168 is a wasteful number, since it uses less digits than its factorization.

8181732168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571242 (or 571235 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 8181732168 is about 90452.9279128100. The cubic root of 8181732168 is about 2015.0310973862.

The spelling of 8181732168 in words is "eight billion, one hundred eighty-one million, seven hundred thirty-two thousand, one hundred sixty-eight".