18682779679816 has 32 divisors (see below), whose sum is σ = 40035787381440. Its totient is φ = 8006653677888.

The previous prime is 18682779679793. The next prime is 18682779679873. The reversal of 18682779679816 is 61897697728681.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3446511 + ... + 7017406.

It is an arithmetic number, because the mean of its divisors is an integer number (1251118355670).

Almost surely, 2^{18682779679816} is an apocalyptic number.

It is an amenable number.

18682779679816 is an abundant number, since it is smaller than the sum of its proper divisors (21353007701624).

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

18682779679816 is a wasteful number, since it uses less digits than its factorization.

18682779679816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10495813 (or 10495809 counting only the distinct ones).

The product of its digits is 6145155072, while the sum is 85.

The spelling of 18682779679816 in words is "eighteen trillion, six hundred eighty-two billion, seven hundred seventy-nine million, six hundred seventy-nine thousand, eight hundred sixteen".