16545720173611 has 2 divisors, whose sum is σ = 16545720173612. Its totient is φ = 16545720173610.

The previous prime is 16545720173509. The next prime is 16545720173623. The reversal of 16545720173611 is 11637102754561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16545720173611 - 2¹⁹ = 16545719649323 is a prime.

It is not a weakly prime, because it can be changed into another prime (16545720173681) 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 as a sum of consecutive naturals, namely, 8272860086805 + 8272860086806.

It is an arithmetic number, because the mean of its divisors is an integer number (8272860086806).

Almost surely, 2^{16545720173611} is an apocalyptic number.

16545720173611 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545720173611 is an equidigital number, since it uses as much as digits as its factorization.

16545720173611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 16545720173611 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty million, one hundred seventy-three thousand, six hundred eleven".