9985984965 has 40 divisors (see below), whose sum is σ = 19528157088. Its totient is φ = 4841687520.

The previous prime is 9985984933. The next prime is 9985985017. The reversal of 9985984965 is 5694895899.

9985984965 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9985984965 - 2⁵ = 9985984933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9985984893 and 9985984902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1116307 + ... + 1125216.

Almost surely, 2^9985984965 is an apocalyptic number.

It is an amenable number.

9985984965 is a deficient number, since it is larger than the sum of its proper divisors (9542172123).

9985984965 is a wasteful number, since it uses less digits than its factorization.

9985984965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241551 (or 2241542 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 72.

The square root of 9985984965 is about 99929.9002551288. The cubic root of 9985984965 is about 2153.4277368830.

The spelling of 9985984965 in words is "nine billion, nine hundred eighty-five million, nine hundred eighty-four thousand, nine hundred sixty-five".