9899977344 has 128 divisors (see below), whose sum is σ = 26819553600. Its totient is φ = 3234963456.

The previous prime is 9899977343. The next prime is 9899977357. The reversal of 9899977344 is 4437799989.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (9899977343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5016742 + ... + 5018714.

Almost surely, 2^9899977344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9899977344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13409776800).

9899977344 is an abundant number, since it is smaller than the sum of its proper divisors (16919576256).

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

9899977344 is a wasteful number, since it uses less digits than its factorization.

9899977344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242 (or 2230 counting only the distinct ones).

The product of its digits is 123451776, while the sum is 69.

The square root of 9899977344 is about 99498.6298599131. The cubic root of 9899977344 is about 2147.2275310506.

The spelling of 9899977344 in words is "nine billion, eight hundred ninety-nine million, nine hundred seventy-seven thousand, three hundred forty-four".