39980687217 has 16 divisors (see below), whose sum is σ = 54459079488. Its totient is φ = 26080741440.

The previous prime is 39980687203. The next prime is 39980687237. The reversal of 39980687217 is 71278608993.

It is not a de Polignac number, because 39980687217 - 2⁸ = 39980686961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39980687237) 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 15 ways as a sum of consecutive naturals, for example, 277759 + ... + 396372.

It is an arithmetic number, because the mean of its divisors is an integer number (3403692468).

Almost surely, 2^39980687217 is an apocalyptic number.

It is an amenable number.

39980687217 is a deficient number, since it is larger than the sum of its proper divisors (14478392271).

39980687217 is a wasteful number, since it uses less digits than its factorization.

39980687217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674560.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 39980687217 in words is "thirty-nine billion, nine hundred eighty million, six hundred eighty-seven thousand, two hundred seventeen".