9905109868 has 24 divisors (see below), whose sum is σ = 18266411520. Its totient is φ = 4686711120.

The previous prime is 9905109853. The next prime is 9905109869. The reversal of 9905109868 is 8689015099.

It is a super-2 number, since 2×9905109868² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9905109869) 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, 2296 + ... + 140767.

It is an arithmetic number, because the mean of its divisors is an integer number (761100480).

Almost surely, 2^9905109868 is an apocalyptic number.

It is an amenable number.

9905109868 is a deficient number, since it is larger than the sum of its proper divisors (8361301652).

9905109868 is a wasteful number, since it uses less digits than its factorization.

9905109868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143997 (or 143995 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The square root of 9905109868 is about 99524.4184509510. The cubic root of 9905109868 is about 2147.5985350265.

The spelling of 9905109868 in words is "nine billion, nine hundred five million, one hundred nine thousand, eight hundred sixty-eight".