8173819881 has 12 divisors (see below), whose sum is σ = 11830681200. Its totient is φ = 5438112120.

The previous prime is 8173819873. The next prime is 8173819883. The reversal of 8173819881 is 1889183718.

8173819881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8173819881 - 2³ = 8173819873 is a prime.

It is a super-2 number, since 2×8173819881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8173819883) 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, 920431 + ... + 929268.

It is an arithmetic number, because the mean of its divisors is an integer number (985890100).

Almost surely, 2^8173819881 is an apocalyptic number.

It is an amenable number.

8173819881 is a deficient number, since it is larger than the sum of its proper divisors (3656861319).

8173819881 is a wasteful number, since it uses less digits than its factorization.

8173819881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850196 (or 1850193 counting only the distinct ones).

The product of its digits is 774144, while the sum is 54.

The square root of 8173819881 is about 90409.1802916053. The cubic root of 8173819881 is about 2014.3813308790.

The spelling of 8173819881 in words is "eight billion, one hundred seventy-three million, eight hundred nineteen thousand, eight hundred eighty-one".