16543345543 has 8 divisors (see below), whose sum is σ = 17609713200. Its totient is φ = 15496544448.

The previous prime is 16543345529. The next prime is 16543345571. The reversal of 16543345543 is 34554334561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16543345543 - 2²¹ = 16541248391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16543345543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16543345573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4889896 + ... + 4893277.

It is an arithmetic number, because the mean of its divisors is an integer number (2201214150).

Almost surely, 2^16543345543 is an apocalyptic number.

16543345543 is a deficient number, since it is larger than the sum of its proper divisors (1066367657).

16543345543 is an equidigital number, since it uses as much as digits as its factorization.

16543345543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9783281.

The product of its digits is 1296000, while the sum is 43.

The spelling of 16543345543 in words is "sixteen billion, five hundred forty-three million, three hundred forty-five thousand, five hundred forty-three".