9943384064 has 76 divisors (see below), whose sum is σ = 20170369464. Its totient is φ = 4901044224.

The previous prime is 9943384049. The next prime is 9943384067. The reversal of 9943384064 is 4604833499.

It is a super-3 number, since 3×9943384064³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (9943384067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21757724 + ... + 21758180.

Almost surely, 2^9943384064 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 9943384064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10085184732).

9943384064 is an abundant number, since it is smaller than the sum of its proper divisors (10226985400).

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

9943384064 is an frugal number, since it uses more digits than its factorization.

9943384064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 50.

The square root of 9943384064 is about 99716.5185112276. The cubic root of 9943384064 is about 2150.3611482021.

The spelling of 9943384064 in words is "nine billion, nine hundred forty-three million, three hundred eighty-four thousand, sixty-four".