39980687218 has 8 divisors (see below), whose sum is σ = 61591869612. Its totient is φ = 19450064016.

The previous prime is 39980687203. The next prime is 39980687237. The reversal of 39980687218 is 81278608993.

It can be written as a sum of positive squares in 2 ways, for example, as 39556038769 + 424648449 = 198887^2 + 20607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 270139705 + ... + 270139852.

Almost surely, 2^39980687218 is an apocalyptic number.

39980687218 is a deficient number, since it is larger than the sum of its proper divisors (21611182394).

39980687218 is a wasteful number, since it uses less digits than its factorization.

39980687218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540279596.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 39980687218 in words is "thirty-nine billion, nine hundred eighty million, six hundred eighty-seven thousand, two hundred eighteen".