168843521664 has 96 divisors (see below), whose sum is σ = 486617919840. Its totient is φ = 56193937920.

The previous prime is 168843521659. The next prime is 168843521677. The reversal of 168843521664 is 466125348861.

168843521664 is a `hidden beast` number, since 16 + 8 + 8 + 43 + 521 + 6 + 64 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 168843521664.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 632079 + ... + 858609.

It is an arithmetic number, because the mean of its divisors is an integer number (5068936665).

Almost surely, 2^168843521664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168843521664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243308959920).

168843521664 is an abundant number, since it is smaller than the sum of its proper divisors (317774398176).

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

168843521664 is a wasteful number, since it uses less digits than its factorization.

168843521664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227198 (or 227183 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 168843521664 in words is "one hundred sixty-eight billion, eight hundred forty-three million, five hundred twenty-one thousand, six hundred sixty-four".