168977681688 has 16 divisors (see below), whose sum is σ = 422444204280. Its totient is φ = 56325893888.

The previous prime is 168977681687. The next prime is 168977681701. The reversal of 168977681688 is 886186779861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168977681687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3520368345 + ... + 3520368392.

Almost surely, 2^168977681688 is an apocalyptic number.

It is an amenable number.

168977681688 is an abundant number, since it is smaller than the sum of its proper divisors (253466522592).

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

168977681688 is a wasteful number, since it uses less digits than its factorization.

168977681688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7040736746 (or 7040736742 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 75.

The spelling of 168977681688 in words is "one hundred sixty-eight billion, nine hundred seventy-seven million, six hundred eighty-one thousand, six hundred eighty-eight".