9889807985 has 8 divisors (see below), whose sum is σ = 11868452736. Its totient is φ = 7911390960.

The previous prime is 9889807957. The next prime is 9889808011. The reversal of 9889807985 is 5897089889.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9889807985 - 2¹⁴ = 9889791601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60722 + ... + 153188.

It is an arithmetic number, because the mean of its divisors is an integer number (1483556592).

Almost surely, 2^9889807985 is an apocalyptic number.

It is an amenable number.

9889807985 is a deficient number, since it is larger than the sum of its proper divisors (1978644751).

9889807985 is a wasteful number, since it uses less digits than its factorization.

9889807985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113863.

The product of its (nonzero) digits is 104509440, while the sum is 71.

The square root of 9889807985 is about 99447.5137195496. The cubic root of 9889807985 is about 2146.4920610649.

The spelling of 9889807985 in words is "nine billion, eight hundred eighty-nine million, eight hundred seven thousand, nine hundred eighty-five".