9999888699 has 24 divisors (see below), whose sum is σ = 14303984688. Its totient is φ = 6212262400.

The previous prime is 9999888677. The next prime is 9999888719. The reversal of 9999888699 is 9968889999.

It is not a de Polignac number, because 9999888699 - 2¹¹ = 9999886651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9999888629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30469 + ... + 144665.

It is an arithmetic number, because the mean of its divisors is an integer number (595999362).

Almost surely, 2^9999888699 is an apocalyptic number.

9999888699 is a deficient number, since it is larger than the sum of its proper divisors (4304095989).

9999888699 is a wasteful number, since it uses less digits than its factorization.

9999888699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114335 (or 114318 counting only the distinct ones).

The product of its digits is 1632586752, while the sum is 84.

The square root of 9999888699 is about 99999.4434934515. The cubic root of 9999888699 is about 2154.4266969777.

The spelling of 9999888699 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, six hundred ninety-nine".