82129378686 has 32 divisors (see below), whose sum is σ = 166533527328. Its totient is φ = 26997442560.

The previous prime is 82129378619. The next prime is 82129378687. The reversal of 82129378686 is 68687392128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82129378687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5080176 + ... + 5096316.

It is an arithmetic number, because the mean of its divisors is an integer number (5204172729).

Almost surely, 2^82129378686 is an apocalyptic number.

82129378686 is an abundant number, since it is smaller than the sum of its proper divisors (84404148642).

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

82129378686 is a wasteful number, since it uses less digits than its factorization.

82129378686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27836.

The product of its digits is 13934592, while the sum is 60.

The spelling of 82129378686 in words is "eighty-two billion, one hundred twenty-nine million, three hundred seventy-eight thousand, six hundred eighty-six".