82091802181 has 8 divisors (see below), whose sum is σ = 85165760000. Its totient is φ = 79044459120.

The previous prime is 82091802179. The next prime is 82091802187. The reversal of 82091802181 is 18120819028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82091802181 - 2¹ = 82091802179 is a prime.

It is a super-2 number, since 2×82091802181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82091802187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6647406 + ... + 6659743.

It is an arithmetic number, because the mean of its divisors is an integer number (10645720000).

Almost surely, 2^82091802181 is an apocalyptic number.

It is an amenable number.

82091802181 is a deficient number, since it is larger than the sum of its proper divisors (3073957819).

82091802181 is a wasteful number, since it uses less digits than its factorization.

82091802181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13307379.

The product of its (nonzero) digits is 18432, while the sum is 40.

The spelling of 82091802181 in words is "eighty-two billion, ninety-one million, eight hundred two thousand, one hundred eighty-one".