68168686186 has 4 divisors (see below), whose sum is σ = 102253029282. Its totient is φ = 34084343092.

The previous prime is 68168686147. The next prime is 68168686193.

68168686186 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 56779741225 + 11388944961 = 238285^2 + 106719^2 .

It is a super-3 number, since 3×68168686186³ (a number of 33 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 17042171545 + ... + 17042171548.

Almost surely, 2^68168686186 is an apocalyptic number.

68168686186 is a deficient number, since it is larger than the sum of its proper divisors (34084343096).

68168686186 is a wasteful number, since it uses less digits than its factorization.

68168686186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34084343095.

The product of its digits is 31850496, while the sum is 64.

The spelling of 68168686186 in words is "sixty-eight billion, one hundred sixty-eight million, six hundred eighty-six thousand, one hundred eighty-six".