82439984449 has 2 divisors, whose sum is σ = 82439984450. Its totient is φ = 82439984448.

The previous prime is 82439984441. The next prime is 82439984461. The reversal of 82439984449 is 94448993428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72009039025 + 10430945424 = 268345^2 + 102132^2 .

It is a cyclic number.

It is not a de Polignac number, because 82439984449 - 2³ = 82439984441 is a prime.

It is not a weakly prime, because it can be changed into another prime (82439984441) 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 as a sum of consecutive naturals, namely, 41219992224 + 41219992225.

It is an arithmetic number, because the mean of its divisors is an integer number (41219992225).

Almost surely, 2^82439984449 is an apocalyptic number.

It is an amenable number.

82439984449 is a deficient number, since it is larger than the sum of its proper divisors (1).

82439984449 is an equidigital number, since it uses as much as digits as its factorization.

82439984449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71663616, while the sum is 64.

The spelling of 82439984449 in words is "eighty-two billion, four hundred thirty-nine million, nine hundred eighty-four thousand, four hundred forty-nine".