168844328253920 has 144 divisors (see below), whose sum is σ = 441080017678944. Its totient is φ = 61030284057600.

The previous prime is 168844328253919. The next prime is 168844328253929. The reversal of 168844328253920 is 29352823448861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168844328253929) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 22878551 + ... + 29344790.

It is an arithmetic number, because the mean of its divisors is an integer number (3063055678326).

Almost surely, 2^{168844328253920} is an apocalyptic number.

168844328253920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168844328253920 is an abundant number, since it is smaller than the sum of its proper divisors (272235689425024).

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

168844328253920 is a wasteful number, since it uses less digits than its factorization.

168844328253920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52223545 (or 52223526 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 65.

The spelling of 168844328253920 in words is "one hundred sixty-eight trillion, eight hundred forty-four billion, three hundred twenty-eight million, two hundred fifty-three thousand, nine hundred twenty".