9999627648 has 128 divisors (see below), whose sum is σ = 28222992000. Its totient is φ = 3128020992.

The previous prime is 9999627601. The next prime is 9999627661. The reversal of 9999627648 is 8467269999.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774268 + ... + 787076.

It is an arithmetic number, because the mean of its divisors is an integer number (220492125).

Almost surely, 2^9999627648 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 9999627648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14111496000).

9999627648 is an abundant number, since it is smaller than the sum of its proper divisors (18223364352).

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

9999627648 is a wasteful number, since it uses less digits than its factorization.

9999627648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12952 (or 12940 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 69.

The square root of 9999627648 is about 99998.1382226689. The cubic root of 9999627648 is about 2154.4079494311.

The spelling of 9999627648 in words is "nine billion, nine hundred ninety-nine million, six hundred twenty-seven thousand, six hundred forty-eight".