39663928985 has 8 divisors (see below), whose sum is σ = 47710313280. Its totient is φ = 31655410864.

The previous prime is 39663928963. The next prime is 39663928991. The reversal of 39663928985 is 58982936693.

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 a de Polignac number, because none of the positive numbers 2^k-39663928985 is a prime.

It is an unprimeable number.

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, 9464237 + ... + 9468426.

It is an arithmetic number, because the mean of its divisors is an integer number (5963789160).

Almost surely, 2^39663928985 is an apocalyptic number.

It is an amenable number.

39663928985 is a deficient number, since it is larger than the sum of its proper divisors (8046384295).

39663928985 is a wasteful number, since it uses less digits than its factorization.

39663928985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18933087.

The product of its digits is 151165440, while the sum is 68.

The spelling of 39663928985 in words is "thirty-nine billion, six hundred sixty-three million, nine hundred twenty-eight thousand, nine hundred eighty-five".