9985865487 has 8 divisors (see below), whose sum is σ = 14338678704. Its totient is φ = 6145147968.

The previous prime is 9985865479. The next prime is 9985865531. The reversal of 9985865487 is 7845685899.

9985865487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9985865487 - 2³ = 9985865479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9985865437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128023878 + ... + 128023955.

It is an arithmetic number, because the mean of its divisors is an integer number (1792334838).

Almost surely, 2^9985865487 is an apocalyptic number.

9985865487 is a deficient number, since it is larger than the sum of its proper divisors (4352813217).

9985865487 is a wasteful number, since it uses less digits than its factorization.

9985865487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256047849.

The product of its digits is 174182400, while the sum is 69.

The square root of 9985865487 is about 99929.3024442781. The cubic root of 9985865487 is about 2153.4191485709.

The spelling of 9985865487 in words is "nine billion, nine hundred eighty-five million, eight hundred sixty-five thousand, four hundred eighty-seven".