16091538553369 has 2 divisors, whose sum is σ = 16091538553370. Its totient is φ = 16091538553368.

The previous prime is 16091538553351. The next prime is 16091538553481. The reversal of 16091538553369 is 96335583519061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9922216502025 + 6169322051344 = 3149955^2 + 2483812^2 .

It is a cyclic number.

It is not a de Polignac number, because 16091538553369 - 2¹³ = 16091538545177 is a prime.

It is a super-2 number, since 2×16091538553369² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16091538553369.

It is not a weakly prime, because it can be changed into another prime (16091538553169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8045769276684 + 8045769276685.

It is an arithmetic number, because the mean of its divisors is an integer number (8045769276685).

Almost surely, 2^{16091538553369} is an apocalyptic number.

It is an amenable number.

16091538553369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16091538553369 is an equidigital number, since it uses as much as digits as its factorization.

16091538553369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732000, while the sum is 64.

The spelling of 16091538553369 in words is "sixteen trillion, ninety-one billion, five hundred thirty-eight million, five hundred fifty-three thousand, three hundred sixty-nine".