39663948499 has 4 divisors (see below), whose sum is σ = 45330226864. Its totient is φ = 33997670136.

The previous prime is 39663948491. The next prime is 39663948521. The reversal of 39663948499 is 99484936693.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39663948499 - 2³ = 39663948491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39663948491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833139172 + ... + 2833139185.

It is an arithmetic number, because the mean of its divisors is an integer number (11332556716).

Almost surely, 2^39663948499 is an apocalyptic number.

39663948499 is a deficient number, since it is larger than the sum of its proper divisors (5666278365).

39663948499 is an equidigital number, since it uses as much as digits as its factorization.

39663948499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5666278364.

The product of its digits is 272097792, while the sum is 70.

The spelling of 39663948499 in words is "thirty-nine billion, six hundred sixty-three million, nine hundred forty-eight thousand, four hundred ninety-nine".