9999944299626 has 32 divisors (see below), whose sum is σ = 20241281083968. Its totient is φ = 3293084392320.

The previous prime is 9999944299607. The next prime is 9999944299661. The reversal of 9999944299626 is 6269924499999.

9999944299626 is a nontrivial binomial coefficient, being equal to C(4472124, 2).

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 15 ways as a sum of consecutive naturals, for example, 26646400 + ... + 27019076.

It is an arithmetic number, because the mean of its divisors is an integer number (632540033874).

Almost surely, 2^{9999944299626} is an apocalyptic number.

9999944299626 is the 4472123-rd triangular number and also the 2236062-nd hexagonal number.

9999944299626 is an abundant number, since it is smaller than the sum of its proper divisors (10241336784342).

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

9999944299626 is a wasteful number, since it uses less digits than its factorization.

9999944299626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426646.

The product of its digits is 11019960576, while the sum is 87.

The spelling of 9999944299626 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred forty-four million, two hundred ninety-nine thousand, six hundred twenty-six".