82143320181 has 48 divisors (see below), whose sum is σ = 120050963136. Its totient is φ = 49933298688.

The previous prime is 82143320159. The next prime is 82143320191. The reversal of 82143320181 is 18102334128.

It is not a de Polignac number, because 82143320181 - 2⁷ = 82143320053 is a prime.

It is a super-2 number, since 2×82143320181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82143320191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18158986 + ... + 18163508.

It is an arithmetic number, because the mean of its divisors is an integer number (2501061732).

Almost surely, 2^82143320181 is an apocalyptic number.

It is an amenable number.

82143320181 is a deficient number, since it is larger than the sum of its proper divisors (37907642955).

82143320181 is a wasteful number, since it uses less digits than its factorization.

82143320181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982 (or 4969 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The spelling of 82143320181 in words is "eighty-two billion, one hundred forty-three million, three hundred twenty thousand, one hundred eighty-one".