188449027989 has 8 divisors (see below), whose sum is σ = 256611442560. Its totient is φ = 122959649376.

The previous prime is 188449027981. The next prime is 188449028029. The reversal of 188449027989 is 989720944881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188449027989 - 2³ = 188449027981 is a prime.

It is a super-2 number, since 2×188449027989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188449027981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668258824 + ... + 668259105.

It is an arithmetic number, because the mean of its divisors is an integer number (32076430320).

Almost surely, 2^188449027989 is an apocalyptic number.

It is an amenable number.

188449027989 is a deficient number, since it is larger than the sum of its proper divisors (68162414571).

188449027989 is a wasteful number, since it uses less digits than its factorization.

188449027989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336517979.

The product of its (nonzero) digits is 83607552, while the sum is 69.

The spelling of 188449027989 in words is "one hundred eighty-eight billion, four hundred forty-nine million, twenty-seven thousand, nine hundred eighty-nine".