168141779808 has 96 divisors (see below), whose sum is σ = 449189193600. Its totient is φ = 55062183936.

The previous prime is 168141779789. The next prime is 168141779843. The reversal of 168141779808 is 808977141861.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367328 + ... + 1485216.

It is an arithmetic number, because the mean of its divisors is an integer number (4679054100).

Almost surely, 2^168141779808 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 168141779808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224594596800).

168141779808 is an abundant number, since it is smaller than the sum of its proper divisors (281047413792).

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

168141779808 is a wasteful number, since it uses less digits than its factorization.

168141779808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118164 (or 118156 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 60.

The spelling of 168141779808 in words is "one hundred sixty-eight billion, one hundred forty-one million, seven hundred seventy-nine thousand, eight hundred eight".