39640912386172 has 6 divisors (see below), whose sum is σ = 69371596675808. Its totient is φ = 19820456193084.

The previous prime is 39640912386091. The next prime is 39640912386191. The reversal of 39640912386172 is 27168321904693.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 39640912386172.

It is a congruent 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 as a sum of consecutive naturals, namely, 4955114048268 + ... + 4955114048275.

Almost surely, 2^{39640912386172} is an apocalyptic number.

It is an amenable number.

39640912386172 is a deficient number, since it is larger than the sum of its proper divisors (29730684289636).

39640912386172 is a wasteful number, since it uses less digits than its factorization.

39640912386172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9910228096547 (or 9910228096545 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 39640912386172 in words is "thirty-nine trillion, six hundred forty billion, nine hundred twelve million, three hundred eighty-six thousand, one hundred seventy-two".