9929509521944 has 8 divisors (see below), whose sum is σ = 18617830353660. Its totient is φ = 4964754760968.

The previous prime is 9929509521937. The next prime is 9929509521949. The reversal of 9929509521944 is 4491259059299.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9929509521949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620594345114 + ... + 620594345129.

Almost surely, 2^{9929509521944} is an apocalyptic number.

It is an amenable number.

9929509521944 is a deficient number, since it is larger than the sum of its proper divisors (8688320831716).

9929509521944 is a wasteful number, since it uses less digits than its factorization.

9929509521944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241188690249 (or 1241188690245 counting only the distinct ones).

The product of its (nonzero) digits is 94478400, while the sum is 68.

The spelling of 9929509521944 in words is "nine trillion, nine hundred twenty-nine billion, five hundred nine million, five hundred twenty-one thousand, nine hundred forty-four".