168890817912 has 16 divisors (see below), whose sum is σ = 422227044840. Its totient is φ = 56296939296.

The previous prime is 168890817911. The next prime is 168890818013. The reversal of 168890817912 is 219718098861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168890817911) 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, 3518558683 + ... + 3518558730.

Almost surely, 2^168890817912 is an apocalyptic number.

168890817912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168890817912 is an abundant number, since it is smaller than the sum of its proper divisors (253336226928).

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

168890817912 is a wasteful number, since it uses less digits than its factorization.

168890817912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037117422 (or 7037117418 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 60.

The spelling of 168890817912 in words is "one hundred sixty-eight billion, eight hundred ninety million, eight hundred seventeen thousand, nine hundred twelve".