9678581985 has 8 divisors (see below), whose sum is σ = 15485731200. Its totient is φ = 5161910384.

The previous prime is 9678581963. The next prime is 9678582037. The reversal of 9678581985 is 5891858769.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9678581985 - 2⁶ = 9678581921 is a prime.

It is a Curzon 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, 322619385 + ... + 322619414.

It is an arithmetic number, because the mean of its divisors is an integer number (1935716400).

Almost surely, 2^9678581985 is an apocalyptic number.

It is an amenable number.

9678581985 is a deficient number, since it is larger than the sum of its proper divisors (5807149215).

9678581985 is a wasteful number, since it uses less digits than its factorization.

9678581985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645238807.

The product of its digits is 43545600, while the sum is 66.

The square root of 9678581985 is about 98379.7844325754. The cubic root of 9678581985 is about 2131.1004023386.

The spelling of 9678581985 in words is "nine billion, six hundred seventy-eight million, five hundred eighty-one thousand, nine hundred eighty-five".