9999890634216 has 128 divisors (see below), whose sum is σ = 28936664064000. Its totient is φ = 2820566541312.

The previous prime is 9999890634199. The next prime is 9999890634241. The reversal of 9999890634216 is 6124360989999.

9999890634216 is a nontrivial binomial coefficient, being equal to C(4472112, 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107284080 + ... + 107377248.

It is an arithmetic number, because the mean of its divisors is an integer number (226067688000).

Almost surely, 2^{9999890634216} is an apocalyptic number.

9999890634216 is the 4472111-st triangular number and also the 2236056-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999890634216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14468332032000).

9999890634216 is an abundant number, since it is smaller than the sum of its proper divisors (18936773429784).

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

9999890634216 is a wasteful number, since it uses less digits than its factorization.

9999890634216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101351 (or 101347 counting only the distinct ones).

The product of its (nonzero) digits is 408146688, while the sum is 75.

The spelling of 9999890634216 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred ninety million, six hundred thirty-four thousand, two hundred sixteen".