168438771877812 has 192 divisors, whose sum is σ = 445827098787840. Its totient is φ = 49214646835200.

The previous prime is 168438771877723. The next prime is 168438771877837. The reversal of 168438771877812 is 218778177834861.

168438771877812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54806737 + ... + 57798407.

It is an arithmetic number, because the mean of its divisors is an integer number (2322016139520).

Almost surely, 2^{168438771877812} is an apocalyptic number.

168438771877812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168438771877812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222913549393920).

168438771877812 is an abundant number, since it is smaller than the sum of its proper divisors (277388326910028).

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

168438771877812 is a wasteful number, since it uses less digits than its factorization.

168438771877812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992062 (or 2992060 counting only the distinct ones).

The product of its digits is 1416167424, while the sum is 78.

The spelling of 168438771877812 in words is "one hundred sixty-eight trillion, four hundred thirty-eight billion, seven hundred seventy-one million, eight hundred seventy-seven thousand, eight hundred twelve".