39691684216 has 8 divisors (see below), whose sum is σ = 74421907920. Its totient is φ = 19845842104.

The previous prime is 39691684211. The next prime is 39691684231. The reversal of 39691684216 is 61248619693.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39691684211) 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 as a sum of consecutive naturals, namely, 2480730256 + ... + 2480730271.

It is an arithmetic number, because the mean of its divisors is an integer number (9302738490).

Almost surely, 2^39691684216 is an apocalyptic number.

It is an amenable number.

39691684216 is a deficient number, since it is larger than the sum of its proper divisors (34730223704).

39691684216 is a wasteful number, since it uses less digits than its factorization.

39691684216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961460533 (or 4961460529 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 55.

The spelling of 39691684216 in words is "thirty-nine billion, six hundred ninety-one million, six hundred eighty-four thousand, two hundred sixteen".