38743720865565 has 32 divisors (see below), whose sum is σ = 62021154041856. Its totient is φ = 20652918696000.

The previous prime is 38743720865543. The next prime is 38743720865593. The reversal of 38743720865565 is 56556802734783.

It is not a de Polignac number, because 38743720865565 - 2³⁵ = 38709361127197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38743720865565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1135263532 + ... + 1135297658.

It is an arithmetic number, because the mean of its divisors is an integer number (1938161063808).

Almost surely, 2^{38743720865565} is an apocalyptic number.

It is an amenable number.

38743720865565 is a deficient number, since it is larger than the sum of its proper divisors (23277433176291).

38743720865565 is a wasteful number, since it uses less digits than its factorization.

38743720865565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70009.

The product of its (nonzero) digits is 1016064000, while the sum is 69.

The spelling of 38743720865565 in words is "thirty-eight trillion, seven hundred forty-three billion, seven hundred twenty million, eight hundred sixty-five thousand, five hundred sixty-five".