9949888885 has 4 divisors (see below), whose sum is σ = 11939866668. Its totient is φ = 7959911104.

The previous prime is 9949888841. The next prime is 9949888901. The reversal of 9949888885 is 5888889499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5891944081 + 4057944804 = 76759^2 + 63702^2 .

It is a cyclic number.

It is not a de Polignac number, because 9949888885 - 2³³ = 1359954293 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 994988884 + ... + 994988893.

It is an arithmetic number, because the mean of its divisors is an integer number (2984966667).

Almost surely, 2^9949888885 is an apocalyptic number.

It is an amenable number.

9949888885 is a deficient number, since it is larger than the sum of its proper divisors (1989977783).

9949888885 is a wasteful number, since it uses less digits than its factorization.

9949888885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1989977782.

The product of its digits is 477757440, while the sum is 76.

The square root of 9949888885 is about 99749.1297455772. The cubic root of 9949888885 is about 2150.8299579213.

The spelling of 9949888885 in words is "nine billion, nine hundred forty-nine million, eight hundred eighty-eight thousand, eight hundred eighty-five".