2168686718 has 32 divisors (see below), whose sum is σ = 3697021440. Its totient is φ = 945400000.

The previous prime is 2168686679. The next prime is 2168686769. The reversal of 2168686718 is 8176868612.

It is a super-2 number, since 2×2168686718² = 9406404161659223048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2168686718.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32843 + ... + 73593.

It is an arithmetic number, because the mean of its divisors is an integer number (115531920).

Almost surely, 2^2168686718 is an apocalyptic number.

2168686718 is a deficient number, since it is larger than the sum of its proper divisors (1528334722).

2168686718 is a wasteful number, since it uses less digits than its factorization.

2168686718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40864.

The product of its digits is 1548288, while the sum is 53.

The square root of 2168686718 is about 46569.1605893858. The cubic root of 2168686718 is about 1294.3913634904.

It can be divided in two parts, 2168 and 686718, that added together give a palindrome (688886).

The spelling of 2168686718 in words is "two billion, one hundred sixty-eight million, six hundred eighty-six thousand, seven hundred eighteen".