16545724055737 has 4 divisors (see below), whose sum is σ = 16545739161076. Its totient is φ = 16545708950400.

The previous prime is 16545724055723. The next prime is 16545724055753. The reversal of 16545724055737 is 73755042754561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5282256435856 + 11263467619881 = 2298316^2 + 3356109^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545724055737 - 2³⁹ = 15995968241849 is a prime.

It is a super-2 number, since 2×16545724055737² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545725055737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5769264 + ... + 8147137.

It is an arithmetic number, because the mean of its divisors is an integer number (4136434790269).

Almost surely, 2^{16545724055737} is an apocalyptic number.

It is an amenable number.

16545724055737 is a deficient number, since it is larger than the sum of its proper divisors (15105339).

16545724055737 is a wasteful number, since it uses less digits than its factorization.

16545724055737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15105338.

The product of its (nonzero) digits is 123480000, while the sum is 61.

The spelling of 16545724055737 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-four million, fifty-five thousand, seven hundred thirty-seven".