27668968818 has 32 divisors (see below), whose sum is σ = 56704052160. Its totient is φ = 8995434240.

The previous prime is 27668968757. The next prime is 27668968819. The reversal of 27668968818 is 81886986672.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27668968819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952221 + ... + 980847.

It is an arithmetic number, because the mean of its divisors is an integer number (1772001630).

Almost surely, 2^27668968818 is an apocalyptic number.

27668968818 is an abundant number, since it is smaller than the sum of its proper divisors (29035083342).

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

27668968818 is a wasteful number, since it uses less digits than its factorization.

27668968818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32602.

The product of its digits is 111476736, while the sum is 69.

The spelling of 27668968818 in words is "twenty-seven billion, six hundred sixty-eight million, nine hundred sixty-eight thousand, eight hundred eighteen".