189918911016 has 96 divisors (see below), whose sum is σ = 545209914600. Its totient is φ = 59517911040.

The previous prime is 189918910997. The next prime is 189918911029. The reversal of 189918911016 is 610119819981.

It can be written as a sum of positive squares in 4 ways, for example, as 107750688516 + 82168222500 = 328254^2 + 286650^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1053586 + ... + 1220606.

Almost surely, 2^189918911016 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 189918911016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272604957300).

189918911016 is an abundant number, since it is smaller than the sum of its proper divisors (355291003584).

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

189918911016 is a wasteful number, since it uses less digits than its factorization.

189918911016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167979 (or 167972 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 54.

The spelling of 189918911016 in words is "one hundred eighty-nine billion, nine hundred eighteen million, nine hundred eleven thousand, sixteen".