168506421792 has 48 divisors (see below), whose sum is σ = 454284214272. Its totient is φ = 54650730240.

The previous prime is 168506421781. The next prime is 168506421907. The reversal of 168506421792 is 297124605861.

168506421792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 23716384 + ... + 23723487.

It is an arithmetic number, because the mean of its divisors is an integer number (9464254464).

Almost surely, 2^168506421792 is an apocalyptic number.

168506421792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168506421792 is an abundant number, since it is smaller than the sum of its proper divisors (285777792480).

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

168506421792 is a wasteful number, since it uses less digits than its factorization.

168506421792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47439921 (or 47439913 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 168506421792 in words is "one hundred sixty-eight billion, five hundred six million, four hundred twenty-one thousand, seven hundred ninety-two".