9985115898 has 12 divisors (see below), whose sum is σ = 21634417818. Its totient is φ = 3328371960.

The previous prime is 9985115893. The next prime is 9985115911. The reversal of 9985115898 is 8985115899.

It is a happy number.

9985115898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6941055969 + 3044059929 = 83313^2 + 55173^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9985115893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277364313 + ... + 277364348.

Almost surely, 2^9985115898 is an apocalyptic number.

9985115898 is an abundant number, since it is smaller than the sum of its proper divisors (11649301920).

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

9985115898 is a wasteful number, since it uses less digits than its factorization.

9985115898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554728669 (or 554728666 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 63.

The square root of 9985115898 is about 99925.5517773107. The cubic root of 9985115898 is about 2153.3652650860.

Subtracting from 9985115898 its reverse (8985115899), we obtain a palindrome (999999999).

The spelling of 9985115898 in words is "nine billion, nine hundred eighty-five million, one hundred fifteen thousand, eight hundred ninety-eight".