16545122636173 has 4 divisors (see below), whose sum is σ = 16563775537440. Its totient is φ = 16526469734908.

The previous prime is 16545122636143. The next prime is 16545122636209. The reversal of 16545122636173 is 37163622154561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16545122636173 - 2²¹ = 16545120539021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16545122636173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545122636143) 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, 9326449303 + ... + 9326451076.

It is an arithmetic number, because the mean of its divisors is an integer number (4140943884360).

Almost surely, 2^{16545122636173} is an apocalyptic number.

It is an amenable number.

16545122636173 is a deficient number, since it is larger than the sum of its proper divisors (18652901267).

16545122636173 is an equidigital number, since it uses as much as digits as its factorization.

16545122636173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18652901266.

The product of its digits is 5443200, while the sum is 52.

The spelling of 16545122636173 in words is "sixteen trillion, five hundred forty-five billion, one hundred twenty-two million, six hundred thirty-six thousand, one hundred seventy-three".