68131683817668 has 72 divisors (see below), whose sum is σ = 172648565945856. Its totient is φ = 22654309080000.

The previous prime is 68131683817667. The next prime is 68131683817693. The reversal of 68131683817668 is 86671838613186.

68131683817668 is a `hidden beast` number, since 6 + 8 + 1 + 316 + 83 + 8 + 176 + 68 = 666.

It is a super-3 number, since 3×68131683817668³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68131683817596 and 68131683817605.

It is not an unprimeable number, because it can be changed into a prime (68131683817667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53322205 + ... + 54584987.

It is an arithmetic number, because the mean of its divisors is an integer number (2397896749248).

Almost surely, 2^{68131683817668} is an apocalyptic number.

It is an amenable number.

68131683817668 is an abundant number, since it is smaller than the sum of its proper divisors (104516882128188).

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

68131683817668 is a wasteful number, since it uses less digits than its factorization.

68131683817668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266505 (or 1266500 counting only the distinct ones).

The product of its digits is 334430208, while the sum is 72.

The spelling of 68131683817668 in words is "sixty-eight trillion, one hundred thirty-one billion, six hundred eighty-three million, eight hundred seventeen thousand, six hundred sixty-eight".