82186642866 has 32 divisors (see below), whose sum is σ = 170556220800. Its totient is φ = 26380325376.

The previous prime is 82186642861. The next prime is 82186642871. The reversal of 82186642866 is 66824668128.

It is an interprime number because it is at equal distance from previous prime (82186642861) and next prime (82186642871).

It is not an unprimeable number, because it can be changed into a prime (82186642861) 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 15 ways as a sum of consecutive naturals, for example, 1886766 + ... + 1929833.

It is an arithmetic number, because the mean of its divisors is an integer number (5329881900).

Almost surely, 2^82186642866 is an apocalyptic number.

82186642866 is an abundant number, since it is smaller than the sum of its proper divisors (88369577934).

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

82186642866 is a wasteful number, since it uses less digits than its factorization.

82186642866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816738.

The product of its digits is 10616832, while the sum is 57.

The spelling of 82186642866 in words is "eighty-two billion, one hundred eighty-six million, six hundred forty-two thousand, eight hundred sixty-six".