9908118009 has 12 divisors (see below), whose sum is σ = 14318376852. Its totient is φ = 6602342400.

The previous prime is 9908117993. The next prime is 9908118013. The reversal of 9908118009 is 9008118099.

It can be written as a sum of positive squares in 2 ways, for example, as 6356553984 + 3551564025 = 79728^2 + 59595^2 .

It is not a de Polignac number, because 9908118009 - 2⁴ = 9908117993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9908118509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235272 + ... + 274169.

It is an arithmetic number, because the mean of its divisors is an integer number (1193198071).

Almost surely, 2^9908118009 is an apocalyptic number.

It is an amenable number.

9908118009 is a deficient number, since it is larger than the sum of its proper divisors (4410258843).

9908118009 is a wasteful number, since it uses less digits than its factorization.

9908118009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511608 (or 511605 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 9908118009 is about 99539.5298813491. The cubic root of 9908118009 is about 2147.8159186266.

The spelling of 9908118009 in words is "nine billion, nine hundred eight million, one hundred eighteen thousand, nine".