16163821188 has 120 divisors (see below), whose sum is σ = 42789626880. Its totient is φ = 5320261440.

The previous prime is 16163821127. The next prime is 16163821207. The reversal of 16163821188 is 88112836161.

16163821188 is a `hidden beast` number, since 1 + 6 + 1 + 638 + 2 + 1 + 1 + 8 + 8 = 666.

It is a super-2 number, since 2×16163821188² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9718845 + ... + 9720507.

It is an arithmetic number, because the mean of its divisors is an integer number (356580224).

Almost surely, 2^16163821188 is an apocalyptic number.

16163821188 is a gapful number since it is divisible by the number (18) 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 16163821188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21394813440).

16163821188 is an abundant number, since it is smaller than the sum of its proper divisors (26625805692).

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

16163821188 is a wasteful number, since it uses less digits than its factorization.

16163821188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039 (or 2028 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The spelling of 16163821188 in words is "sixteen billion, one hundred sixty-three million, eight hundred twenty-one thousand, one hundred eighty-eight".