82108338815 has 4 divisors (see below), whose sum is σ = 98530006584. Its totient is φ = 65686671048.

The previous prime is 82108338797. The next prime is 82108338817. The reversal of 82108338815 is 51883380128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82108338815 - 2²² = 82104144511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82108338815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82108338817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8210833877 + ... + 8210833886.

It is an arithmetic number, because the mean of its divisors is an integer number (24632501646).

Almost surely, 2^82108338815 is an apocalyptic number.

82108338815 is a deficient number, since it is larger than the sum of its proper divisors (16421667769).

82108338815 is a wasteful number, since it uses less digits than its factorization.

82108338815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16421667768.

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 82108338815 in words is "eighty-two billion, one hundred eight million, three hundred thirty-eight thousand, eight hundred fifteen".