16657613542369 has 2 divisors, whose sum is σ = 16657613542370. Its totient is φ = 16657613542368.

The previous prime is 16657613542343. The next prime is 16657613542387. The reversal of 16657613542369 is 96324531675661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16620175936225 + 37437606144 = 4076785^2 + 193488^2 .

It is a cyclic number.

It is not a de Polignac number, because 16657613542369 - 2⁵ = 16657613542337 is a prime.

It is a super-2 number, since 2×16657613542369² (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 16657613542369.

It is not a weakly prime, because it can be changed into another prime (16657613542309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328806771184 + 8328806771185.

It is an arithmetic number, because the mean of its divisors is an integer number (8328806771185).

Almost surely, 2^{16657613542369} is an apocalyptic number.

It is an amenable number.

16657613542369 is a deficient number, since it is larger than the sum of its proper divisors (1).

16657613542369 is an equidigital number, since it uses as much as digits as its factorization.

16657613542369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 146966400, while the sum is 64.

The spelling of 16657613542369 in words is "sixteen trillion, six hundred fifty-seven billion, six hundred thirteen million, five hundred forty-two thousand, three hundred sixty-nine".