16616111267543 has 4 divisors (see below), whose sum is σ = 16645211287848. Its totient is φ = 16587011247240.

The previous prime is 16616111267533. The next prime is 16616111267633. The reversal of 16616111267543 is 34576211161661.

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

It is a cyclic number.

It is not a de Polignac number, because 16616111267543 - 2²⁴ = 16616094490327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16616111267491 and 16616111267500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16616111267533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14550009296 + ... + 14550010437.

It is an arithmetic number, because the mean of its divisors is an integer number (4161302821962).

Almost surely, 2^{16616111267543} is an apocalyptic number.

16616111267543 is a deficient number, since it is larger than the sum of its proper divisors (29100020305).

16616111267543 is an equidigital number, since it uses as much as digits as its factorization.

16616111267543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29100020304.

The product of its digits is 1088640, while the sum is 50.

The spelling of 16616111267543 in words is "sixteen trillion, six hundred sixteen billion, one hundred eleven million, two hundred sixty-seven thousand, five hundred forty-three".