82718439705 has 40 divisors (see below), whose sum is σ = 161760513024. Its totient is φ = 40105908000.

The previous prime is 82718439697. The next prime is 82718439709. The reversal of 82718439705 is 50793481728.

It is a happy number.

It is not a de Polignac number, because 82718439705 - 2³ = 82718439697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82718439709) 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 39 ways as a sum of consecutive naturals, for example, 9279321 + ... + 9288230.

Almost surely, 2^82718439705 is an apocalyptic number.

It is an amenable number.

82718439705 is a deficient number, since it is larger than the sum of its proper divisors (79042073319).

82718439705 is a wasteful number, since it uses less digits than its factorization.

82718439705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18567579 (or 18567570 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 82718439705 in words is "eighty-two billion, seven hundred eighteen million, four hundred thirty-nine thousand, seven hundred five".