9989446449898 has 8 divisors (see below), whose sum is σ = 14984183135808. Its totient is φ = 4994718737964.

The previous prime is 9989446449889. The next prime is 9989446449959. The reversal of 9989446449898 is 8989446449899.

9989446449898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2874465 + ... + 5314267.

It is an arithmetic number, because the mean of its divisors is an integer number (1873022891976).

Almost surely, 2^{9989446449898} is an apocalyptic number.

9989446449898 is a deficient number, since it is larger than the sum of its proper divisors (4994736685910).

9989446449898 is a wasteful number, since it uses less digits than its factorization.

9989446449898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486988.

The product of its digits is 46438023168, while the sum is 91.

Subtracting from 9989446449898 its reverse (8989446449899), we obtain a palindrome (999999999999).

The spelling of 9989446449898 in words is "nine trillion, nine hundred eighty-nine billion, four hundred forty-six million, four hundred forty-nine thousand, eight hundred ninety-eight".