16545717665745 has 32 divisors (see below), whose sum is σ = 26655658761600. Its totient is φ = 8763567429120.

The previous prime is 16545717665707. The next prime is 16545717665761. The reversal of 16545717665745 is 54756671754561.

It is not a de Polignac number, because 16545717665745 - 2²⁰ = 16545716617169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16545717665745.

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, 11692557 + ... + 13031013.

It is an arithmetic number, because the mean of its divisors is an integer number (832989336300).

Almost surely, 2^{16545717665745} is an apocalyptic number.

16545717665745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16545717665745 is a deficient number, since it is larger than the sum of its proper divisors (10109941095855).

16545717665745 is a wasteful number, since it uses less digits than its factorization.

16545717665745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344145.

The product of its digits is 740880000, while the sum is 69.

The spelling of 16545717665745 in words is "sixteen trillion, five hundred forty-five billion, seven hundred seventeen million, six hundred sixty-five thousand, seven hundred forty-five".