82971809999 has 8 divisors (see below), whose sum is σ = 89445728400. Its totient is φ = 76510958976.

The previous prime is 82971809993. The next prime is 82971810007. The reversal of 82971809999 is 99990817928.

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 82971809999 - 2¹⁶ = 82971744463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82971809993) 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 7 ways as a sum of consecutive naturals, for example, 3253649 + ... + 3279050.

It is an arithmetic number, because the mean of its divisors is an integer number (11180716050).

Almost surely, 2^82971809999 is an apocalyptic number.

82971809999 is a deficient number, since it is larger than the sum of its proper divisors (6473918401).

82971809999 is a wasteful number, since it uses less digits than its factorization.

82971809999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533689.

The product of its (nonzero) digits is 52907904, while the sum is 71.

The spelling of 82971809999 in words is "eighty-two billion, nine hundred seventy-one million, eight hundred nine thousand, nine hundred ninety-nine".