9909999999648 has 360 divisors, whose sum is σ = 33927467045472. Its totient is φ = 2829419341056.

The previous prime is 9909999999611. The next prime is 9909999999703. The reversal of 9909999999648 is 8469999999099.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 183753615 + ... + 183807537.

Almost surely, 2^{9909999999648} is an apocalyptic number.

9909999999648 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9909999999648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16963733522736).

9909999999648 is an abundant number, since it is smaller than the sum of its proper divisors (24017467045824).

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

9909999999648 is a wasteful number, since it uses less digits than its factorization.

9909999999648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55406 (or 55382 counting only the distinct ones).

The product of its (nonzero) digits is 74384733888, while the sum is 99.

The spelling of 9909999999648 in words is "nine trillion, nine hundred nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred forty-eight".