9999888696 has 80 divisors (see below), whose sum is σ = 32010240240. Its totient is φ = 2857109760.

The previous prime is 9999888677. The next prime is 9999888719. The reversal of 9999888696 is 6968889999.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1097745 + ... + 1106816.

It is an arithmetic number, because the mean of its divisors is an integer number (400128003).

Almost surely, 2^9999888696 is an apocalyptic number.

It is an amenable number.

9999888696 is an abundant number, since it is smaller than the sum of its proper divisors (22010351544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999888696 is a wasteful number, since it uses less digits than its factorization.

9999888696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2204586 (or 2204573 counting only the distinct ones).

The product of its digits is 1088391168, while the sum is 81.

The square root of 9999888696 is about 99999.4434784514. The cubic root of 9999888696 is about 2154.4266967623.

The spelling of 9999888696 in words is "nine billion, nine hundred ninety-nine million, eight hundred eighty-eight thousand, six hundred ninety-six".