9899860994 has 16 divisors (see below), whose sum is σ = 14941713600. Its totient is φ = 4919323344.

The previous prime is 9899860987. The next prime is 9899861011. The reversal of 9899860994 is 4990689989.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665324 + ... + 680040.

It is an arithmetic number, because the mean of its divisors is an integer number (933857100).

Almost surely, 2^9899860994 is an apocalyptic number.

9899860994 is a deficient number, since it is larger than the sum of its proper divisors (5041852606).

9899860994 is a wasteful number, since it uses less digits than its factorization.

9899860994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16777.

The product of its (nonzero) digits is 90699264, while the sum is 71.

The square root of 9899860994 is about 99498.0451767772. The cubic root of 9899860994 is about 2147.2191192164.

The spelling of 9899860994 in words is "nine billion, eight hundred ninety-nine million, eight hundred sixty thousand, nine hundred ninety-four".