989401605984 has 144 divisors (see below), whose sum is σ = 3230940847680. Its totient is φ = 284038721280.

The previous prime is 989401605979. The next prime is 989401606031. The reversal of 989401605984 is 489506104989.

989401605984 is a `hidden beast` number, since 9 + 89 + 401 + 60 + 5 + 98 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

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, 8158522 + ... + 8278905.

It is an arithmetic number, because the mean of its divisors is an integer number (22437089220).

Almost surely, 2^989401605984 is an apocalyptic number.

It is an amenable number.

989401605984 is an abundant number, since it is smaller than the sum of its proper divisors (2241539241696).

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

989401605984 is a wasteful number, since it uses less digits than its factorization.

989401605984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16437473 (or 16437462 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 989401605984 in words is "nine hundred eighty-nine billion, four hundred one million, six hundred five thousand, nine hundred eighty-four".