9989129816 has 16 divisors (see below), whose sum is σ = 19543950000. Its totient is φ = 4777409824.

The previous prime is 9989129809. The next prime is 9989129831. The reversal of 9989129816 is 6189219899.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27144191 + ... + 27144558.

It is an arithmetic number, because the mean of its divisors is an integer number (1221496875).

Almost surely, 2^9989129816 is an apocalyptic number.

It is an amenable number.

9989129816 is a deficient number, since it is larger than the sum of its proper divisors (9554820184).

9989129816 is a wasteful number, since it uses less digits than its factorization.

9989129816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54288778 (or 54288774 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 62.

The square root of 9989129816 is about 99945.6343018543. The cubic root of 9989129816 is about 2153.6537702889.

The spelling of 9989129816 in words is "nine billion, nine hundred eighty-nine million, one hundred twenty-nine thousand, eight hundred sixteen".