2166189168 has 160 divisors (see below), whose sum is σ = 6599077632. Its totient is φ = 603648000.

The previous prime is 2166189143. The next prime is 2166189173. The reversal of 2166189168 is 8619816612.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2752071 + ... + 2752857.

Almost surely, 2^2166189168 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 2166189168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3299538816).

2166189168 is an abundant number, since it is smaller than the sum of its proper divisors (4432888464).

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

2166189168 is a wasteful number, since it uses less digits than its factorization.

2166189168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1217 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 2166189168 is about 46542.3373714729. The cubic root of 2166189168 is about 1293.8942809427.

The spelling of 2166189168 in words is "two billion, one hundred sixty-six million, one hundred eighty-nine thousand, one hundred sixty-eight".