9989446449899 has 8 divisors (see below), whose sum is σ = 11429097347328. Its totient is φ = 8552942332200.

The previous prime is 9989446449889. The next prime is 9989446449959.

9989446449899 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 9989446449899 - 2⁴⁰ = 8889934822123 is a prime.

It is a super-2 number, since 2×9989446449899² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9989446449889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 786688127 + ... + 786700824.

It is an arithmetic number, because the mean of its divisors is an integer number (1428637168416).

Almost surely, 2^{9989446449899} is an apocalyptic number.

9989446449899 is a deficient number, since it is larger than the sum of its proper divisors (1439650897429).

9989446449899 is a wasteful number, since it uses less digits than its factorization.

9989446449899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573389865.

The product of its digits is 52242776064, while the sum is 92.

The spelling of 9989446449899 in words is "nine trillion, nine hundred eighty-nine billion, four hundred forty-six million, four hundred forty-nine thousand, eight hundred ninety-nine".