39961636616 has 32 divisors (see below), whose sum is σ = 82163268000. Its totient is φ = 18070256640.

The previous prime is 39961636607. The next prime is 39961636651. The reversal of 39961636616 is 61663616993.

It is a happy number.

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, 1159466 + ... + 1193433.

It is an arithmetic number, because the mean of its divisors is an integer number (2567602125).

Almost surely, 2^39961636616 is an apocalyptic number.

It is an amenable number.

39961636616 is an abundant number, since it is smaller than the sum of its proper divisors (42201631384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39961636616 is a wasteful number, since it uses less digits than its factorization.

39961636616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353109 (or 2353105 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 56.

The spelling of 39961636616 in words is "thirty-nine billion, nine hundred sixty-one million, six hundred thirty-six thousand, six hundred sixteen".