189109989036 has 48 divisors (see below), whose sum is σ = 500716769280. Its totient is φ = 61695455760.

The previous prime is 189109989031. The next prime is 189109989059. The reversal of 189109989036 is 630989901981.

It is not an unprimeable number, because it can be changed into a prime (189109989031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18622780 + ... + 18632931.

It is an arithmetic number, because the mean of its divisors is an integer number (10431599360).

Almost surely, 2^189109989036 is an apocalyptic number.

It is an amenable number.

189109989036 is an abundant number, since it is smaller than the sum of its proper divisors (311606780244).

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

189109989036 is a wasteful number, since it uses less digits than its factorization.

189109989036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37255771 (or 37255763 counting only the distinct ones).

The product of its (nonzero) digits is 7558272, while the sum is 63.

The spelling of 189109989036 in words is "one hundred eighty-nine billion, one hundred nine million, nine hundred eighty-nine thousand, thirty-six".