82116709789 has 4 divisors (see below), whose sum is σ = 82119369024. Its totient is φ = 82114050556.

The previous prime is 82116709777. The next prime is 82116709837. The reversal of 82116709789 is 98790761128.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82116709789 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82116709189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282747 + ... + 1345240.

It is an arithmetic number, because the mean of its divisors is an integer number (20529842256).

Almost surely, 2^82116709789 is an apocalyptic number.

It is an amenable number.

82116709789 is a deficient number, since it is larger than the sum of its proper divisors (2659235).

82116709789 is a wasteful number, since it uses less digits than its factorization.

82116709789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659234.

The product of its (nonzero) digits is 3048192, while the sum is 58.

The spelling of 82116709789 in words is "eighty-two billion, one hundred sixteen million, seven hundred nine thousand, seven hundred eighty-nine".