168864198918 has 32 divisors (see below), whose sum is σ = 346811764320. Its totient is φ = 54780887040.

The previous prime is 168864198901. The next prime is 168864198931. The reversal of 168864198918 is 819891468861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738555 + ... + 939782.

It is an arithmetic number, because the mean of its divisors is an integer number (10837867635).

Almost surely, 2^168864198918 is an apocalyptic number.

168864198918 is an abundant number, since it is smaller than the sum of its proper divisors (177947565402).

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

168864198918 is a wasteful number, since it uses less digits than its factorization.

168864198918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678792.

The product of its digits is 47775744, while the sum is 69.

The spelling of 168864198918 in words is "one hundred sixty-eight billion, eight hundred sixty-four million, one hundred ninety-eight thousand, nine hundred eighteen".