168417421504 has 56 divisors (see below), whose sum is σ = 352150476800. Its totient is φ = 79695601920.

The previous prime is 168417421433. The next prime is 168417421621. The reversal of 168417421504 is 405124714861.

168417421504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1135177 + ... + 1274935.

Almost surely, 2^168417421504 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 168417421504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176075238400).

168417421504 is an abundant number, since it is smaller than the sum of its proper divisors (183733055296).

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

168417421504 is a wasteful number, since it uses less digits than its factorization.

168417421504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140781 (or 140771 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 168417421504 in words is "one hundred sixty-eight billion, four hundred seventeen million, four hundred twenty-one thousand, five hundred four".