9986556899 has 16 divisors (see below), whose sum is σ = 11293413120. Its totient is φ = 8747494560.

The previous prime is 9986556893. The next prime is 9986556917.

9986556899 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 9986556899 - 2¹² = 9986552803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9986556893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123212 + ... + 187494.

It is an arithmetic number, because the mean of its divisors is an integer number (705838320).

Almost surely, 2^9986556899 is an apocalyptic number.

9986556899 is a deficient number, since it is larger than the sum of its proper divisors (1306856221).

9986556899 is a wasteful number, since it uses less digits than its factorization.

9986556899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64810.

The product of its digits is 377913600, while the sum is 74.

The square root of 9986556899 is about 99932.7618901829. The cubic root of 9986556899 is about 2153.4688476674.

The spelling of 9986556899 in words is "nine billion, nine hundred eighty-six million, five hundred fifty-six thousand, eight hundred ninety-nine".