9991614868 has 12 divisors (see below), whose sum is σ = 17487040480. Its totient is φ = 4995317592.

The previous prime is 9991614769. The next prime is 9991614877. The reversal of 9991614868 is 8684161999.

9991614868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 74478 + ... + 159781.

Almost surely, 2^9991614868 is an apocalyptic number.

It is an amenable number.

9991614868 is a deficient number, since it is larger than the sum of its proper divisors (7495425612).

9991614868 is a wasteful number, since it uses less digits than its factorization.

9991614868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244926 (or 244924 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 61.

The square root of 9991614868 is about 99958.0655475085. The cubic root of 9991614868 is about 2153.8323476678.

The spelling of 9991614868 in words is "nine billion, nine hundred ninety-one million, six hundred fourteen thousand, eight hundred sixty-eight".