999981684448 has 24 divisors (see below), whose sum is σ = 2000987944200. Its totient is φ = 491794270080.

The previous prime is 999981684409. The next prime is 999981684451. The reversal of 999981684448 is 844486189999.

999981684448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 256140898 + ... + 256144801.

It is an arithmetic number, because the mean of its divisors is an integer number (83374497675).

Almost surely, 2^999981684448 is an apocalyptic number.

It is an amenable number.

999981684448 is an abundant number, since it is smaller than the sum of its proper divisors (1001006259752).

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

999981684448 is a wasteful number, since it uses less digits than its factorization.

999981684448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512285770 (or 512285762 counting only the distinct ones).

The product of its digits is 1289945088, while the sum is 79.

The spelling of 999981684448 in words is "nine hundred ninety-nine billion, nine hundred eighty-one million, six hundred eighty-four thousand, four hundred forty-eight".