989179845989 has 8 divisors (see below), whose sum is σ = 1011012657120. Its totient is φ = 967528220400.

The previous prime is 989179845893. The next prime is 989179845991. The reversal of 989179845989 is 989548971989.

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

It is a cyclic number.

It is not a de Polignac number, because 989179845989 - 2³⁶ = 920460369253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989179845989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989179847989) 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, 45285347 + ... + 45307184.

It is an arithmetic number, because the mean of its divisors is an integer number (126376582140).

Almost surely, 2^989179845989 is an apocalyptic number.

It is an amenable number.

989179845989 is a deficient number, since it is larger than the sum of its proper divisors (21832811131).

989179845989 is a wasteful number, since it uses less digits than its factorization.

989179845989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90592771.

The product of its digits is 4232632320, while the sum is 86.

The spelling of 989179845989 in words is "nine hundred eighty-nine billion, one hundred seventy-nine million, eight hundred forty-five thousand, nine hundred eighty-nine".