188189165000 has 80 divisors (see below), whose sum is σ = 445882506300. Its totient is φ = 74429696000.

The previous prime is 188189164993. The next prime is 188189165027. The reversal of 188189165000 is 561981881.

188189165000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 10 ways, for example, as 33656837764 + 154532327236 = 183458^2 + 393106^2 .

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 233552 + ... + 656448.

Almost surely, 2^188189165000 is an apocalyptic number.

188189165000 is a gapful number since it is divisible by the number (10) 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 188189165000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222941253150).

188189165000 is an abundant number, since it is smaller than the sum of its proper divisors (257693341300).

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

188189165000 is an equidigital number, since it uses as much as digits as its factorization.

188189165000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423012 (or 422993 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 47.

The spelling of 188189165000 in words is "one hundred eighty-eight billion, one hundred eighty-nine million, one hundred sixty-five thousand".