81984522329 has 16 divisors (see below), whose sum is σ = 84458235840. Its totient is φ = 79556178240.

The previous prime is 81984522311. The next prime is 81984522383. The reversal of 81984522329 is 92322548918.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81984522329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81984522229) 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, 1230974 + ... + 1295864.

It is an arithmetic number, because the mean of its divisors is an integer number (5278639740).

Almost surely, 2^81984522329 is an apocalyptic number.

It is an amenable number.

81984522329 is a deficient number, since it is larger than the sum of its proper divisors (2473713511).

81984522329 is a wasteful number, since it uses less digits than its factorization.

81984522329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65240.

The product of its digits is 2488320, while the sum is 53.

The spelling of 81984522329 in words is "eighty-one billion, nine hundred eighty-four million, five hundred twenty-two thousand, three hundred twenty-nine".