16545724057729 has 2 divisors, whose sum is σ = 16545724057730. Its totient is φ = 16545724057728.

The previous prime is 16545724057717. The next prime is 16545724057747. The reversal of 16545724057729 is 92775042754561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9287134350400 + 7258589707329 = 3047480^2 + 2694177^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545724057729 - 2²¹ = 16545721960577 is a prime.

It is not a weakly prime, because it can be changed into another prime (16545724457729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272862028864 + 8272862028865.

It is an arithmetic number, because the mean of its divisors is an integer number (8272862028865).

Almost surely, 2^{16545724057729} is an apocalyptic number.

It is an amenable number.

16545724057729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545724057729 is an equidigital number, since it uses as much as digits as its factorization.

16545724057729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176000, while the sum is 64.

The spelling of 16545724057729 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-four million, fifty-seven thousand, seven hundred twenty-nine".