39686217796 has 9 divisors (see below), whose sum is σ = 69451578399. Its totient is φ = 19842909684.

The previous prime is 39686217709. The next prime is 39686217799. The reversal of 39686217796 is 69771268693.

It is a happy number.

The square root of 39686217796 is 199214.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39686217799) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 348625 + ... + 448231.

Almost surely, 2^39686217796 is an apocalyptic number.

39686217796 is the 199214-th square number.

It is an amenable number.

39686217796 is a deficient number, since it is larger than the sum of its proper divisors (29765360603).

39686217796 is an frugal number, since it uses more digits than its factorization.

39686217796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199218 (or 99609 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 64.

Multiplying 39686217796 by its sum of digits (64), we get a square (2539917938944 = 1593712²).

The spelling of 39686217796 in words is "thirty-nine billion, six hundred eighty-six million, two hundred seventeen thousand, seven hundred ninety-six".