9988937985 has 64 divisors (see below), whose sum is σ = 17485332480. Its totient is φ = 4840093440.

The previous prime is 9988937977. The next prime is 9988938061. The reversal of 9988937985 is 5897398899.

It is not a de Polignac number, because 9988937985 - 2³ = 9988937977 is a prime.

It is a Curzon number.

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 63 ways as a sum of consecutive naturals, for example, 3242676 + ... + 3245754.

It is an arithmetic number, because the mean of its divisors is an integer number (273208320).

Almost surely, 2^9988937985 is an apocalyptic number.

It is an amenable number.

9988937985 is a deficient number, since it is larger than the sum of its proper divisors (7496394495).

9988937985 is a wasteful number, since it uses less digits than its factorization.

9988937985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3358.

The product of its digits is 352719360, while the sum is 75.

The square root of 9988937985 is about 99944.6746205119. The cubic root of 9988937985 is about 2153.6399839629.

The spelling of 9988937985 in words is "nine billion, nine hundred eighty-eight million, nine hundred thirty-seven thousand, nine hundred eighty-five".