168209867872 has 24 divisors (see below), whose sum is σ = 332163691272. Its totient is φ = 83850835200.

The previous prime is 168209867869. The next prime is 168209867893. The reversal of 168209867872 is 278768902861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7929829 + ... + 7951012.

It is an arithmetic number, because the mean of its divisors is an integer number (13840153803).

Almost surely, 2^168209867872 is an apocalyptic number.

It is an amenable number.

168209867872 is a deficient number, since it is larger than the sum of its proper divisors (163953823400).

168209867872 is a wasteful number, since it uses less digits than its factorization.

168209867872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15881182 (or 15881174 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 64.

The spelling of 168209867872 in words is "one hundred sixty-eight billion, two hundred nine million, eight hundred sixty-seven thousand, eight hundred seventy-two".