82115215872 has 160 divisors (see below), whose sum is σ = 239617699200. Its totient is φ = 24873074688.

The previous prime is 82115215867. The next prime is 82115215907. The reversal of 82115215872 is 27851251128.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 703029 + ... + 811467.

It is an arithmetic number, because the mean of its divisors is an integer number (1497610620).

Almost surely, 2^82115215872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82115215872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119808849600).

82115215872 is an abundant number, since it is smaller than the sum of its proper divisors (157502483328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82115215872 is a wasteful number, since it uses less digits than its factorization.

82115215872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108506 (or 108490 counting only the distinct ones).

The product of its digits is 89600, while the sum is 42.

The spelling of 82115215872 in words is "eighty-two billion, one hundred fifteen million, two hundred fifteen thousand, eight hundred seventy-two".