189808851568 has 60 divisors (see below), whose sum is σ = 428941333200. Its totient is φ = 81332818560.

The previous prime is 189808851563. The next prime is 189808851569. The reversal of 189808851568 is 865158808981.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

189808851568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189808851563) 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 11 ways as a sum of consecutive naturals, for example, 32271988 + ... + 32277868.

It is an arithmetic number, because the mean of its divisors is an integer number (7149022220).

Almost surely, 2^189808851568 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 189808851568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214470666600).

189808851568 is an abundant number, since it is smaller than the sum of its proper divisors (239132481632).

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

189808851568 is an frugal number, since it uses more digits than its factorization.

189808851568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11791 (or 5890 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 67.

The spelling of 189808851568 in words is "one hundred eighty-nine billion, eight hundred eight million, eight hundred fifty-one thousand, five hundred sixty-eight".