8190909181 has 16 divisors (see below), whose sum is σ = 10083246208. Its totient is φ = 6479352000.

The previous prime is 8190909157. The next prime is 8190909197. The reversal of 8190909181 is 1819090918.

8190909181 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 8190909181 - 2⁵ = 8190909149 is a prime.

It is a super-2 number, since 2×8190909181² (a number of 21 digits) contains 22 as substring.

It is a deceptive number, since it divides R_8190909180.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8190909121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822331 + ... + 832231.

It is an arithmetic number, because the mean of its divisors is an integer number (630202888).

Almost surely, 2^8190909181 is an apocalyptic number.

It is an amenable number.

8190909181 is a deficient number, since it is larger than the sum of its proper divisors (1892337027).

8190909181 is a wasteful number, since it uses less digits than its factorization.

8190909181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19012.

The product of its (nonzero) digits is 46656, while the sum is 46.

The square root of 8190909181 is about 90503.6418107028. The cubic root of 8190909181 is about 2015.7842002208.

The spelling of 8190909181 in words is "eight billion, one hundred ninety million, nine hundred nine thousand, one hundred eighty-one".