9989556911 has 8 divisors (see below), whose sum is σ = 10231928784. Its totient is φ = 9747642240.

The previous prime is 9989556893. The next prime is 9989556917. The reversal of 9989556911 is 1196559899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9989556911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9989556917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69866 + ... + 157671.

It is an arithmetic number, because the mean of its divisors is an integer number (1278991098).

Almost surely, 2^9989556911 is an apocalyptic number.

9989556911 is a deficient number, since it is larger than the sum of its proper divisors (242371873).

9989556911 is a wasteful number, since it uses less digits than its factorization.

9989556911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228601.

The product of its digits is 7873200, while the sum is 62.

The square root of 9989556911 is about 99947.7709156137. The cubic root of 9989556911 is about 2153.6844637081.

The spelling of 9989556911 in words is "nine billion, nine hundred eighty-nine million, five hundred fifty-six thousand, nine hundred eleven".