39717981505344 has 28 divisors (see below), whose sum is σ = 105087159400064. Its totient is φ = 13239327168384.

The previous prime is 39717981505343. The next prime is 39717981505357. The reversal of 39717981505344 is 44350518971793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39717981505343) 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 3 ways as a sum of consecutive naturals, for example, 103432243312 + ... + 103432243695.

Almost surely, 2^{39717981505344} is an apocalyptic number.

It is an amenable number.

39717981505344 is an abundant number, since it is smaller than the sum of its proper divisors (65369177894720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39717981505344 is a wasteful number, since it uses less digits than its factorization.

39717981505344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206864487022 (or 206864487012 counting only the distinct ones).

The product of its (nonzero) digits is 114307200, while the sum is 66.

The spelling of 39717981505344 in words is "thirty-nine trillion, seven hundred seventeen billion, nine hundred eighty-one million, five hundred five thousand, three hundred forty-four".