9991440441999 has 24 divisors (see below), whose sum is σ = 15331036921200. Its totient is φ = 6252489999360.

The previous prime is 9991440441989. The next prime is 9991440442003.

9991440441999 is a `hidden beast` number, since 9 + 9 + 91 + 4 + 4 + 0 + 441 + 9 + 99 = 666.

9991440441999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9991440441999 - 2¹² = 9991440437903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991440441949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268006482 + ... + 268043759.

It is an arithmetic number, because the mean of its divisors is an integer number (638793205050).

Almost surely, 2^{9991440441999} is an apocalyptic number.

9991440441999 is a deficient number, since it is larger than the sum of its proper divisors (5339596479201).

9991440441999 is a wasteful number, since it uses less digits than its factorization.

9991440441999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536050375 (or 536050372 counting only the distinct ones).

The product of its (nonzero) digits is 136048896, while the sum is 72.

The spelling of 9991440441999 in words is "nine trillion, nine hundred ninety-one billion, four hundred forty million, four hundred forty-one thousand, nine hundred ninety-nine".