39945504009 has 8 divisors (see below), whose sum is σ = 53284426272. Its totient is φ = 26618458880.

The previous prime is 39945504007. The next prime is 39945504023. The reversal of 39945504009 is 90040554993.

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 39945504009 - 2¹ = 39945504007 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39945504007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2961432 + ... + 2974889.

It is an arithmetic number, because the mean of its divisors is an integer number (6660553284).

Almost surely, 2^39945504009 is an apocalyptic number.

It is an amenable number.

39945504009 is a deficient number, since it is larger than the sum of its proper divisors (13338922263).

39945504009 is a wasteful number, since it uses less digits than its factorization.

39945504009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5938567.

The product of its (nonzero) digits is 874800, while the sum is 48.

The spelling of 39945504009 in words is "thirty-nine billion, nine hundred forty-five million, five hundred four thousand, nine".