39947102218384 has 45 divisors (see below), whose sum is σ = 79081655734227. Its totient is φ = 19548000462432.

The previous prime is 39947102218379. The next prime is 39947102218391. The reversal of 39947102218384 is 48381220174993.

The square root of 39947102218384 is 6320372.

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

It is a Duffinian number.

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 8 ways as a sum of consecutive naturals, for example, 1188213127 + ... + 1188246745.

Almost surely, 2^{39947102218384} is an apocalyptic number.

39947102218384 is the 6320372-nd square number.

It is an amenable number.

39947102218384 is a deficient number, since it is larger than the sum of its proper divisors (39134553515843).

39947102218384 is an frugal number, since it uses more digits than its factorization.

39947102218384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67340 (or 33668 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 39947102218384 in words is "thirty-nine trillion, nine hundred forty-seven billion, one hundred two million, two hundred eighteen thousand, three hundred eighty-four".