16536388543 has 4 divisors (see below), whose sum is σ = 16848395928. Its totient is φ = 16224381160.

The previous prime is 16536388511. The next prime is 16536388567. The reversal of 16536388543 is 34588363561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34588363561 = 3739 ⋅9250699.

It is a cyclic number.

It is not a de Polignac number, because 16536388543 - 2⁵ = 16536388511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16536368543) 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, 156003613 + ... + 156003718.

It is an arithmetic number, because the mean of its divisors is an integer number (4212098982).

Almost surely, 2^16536388543 is an apocalyptic number.

16536388543 is a deficient number, since it is larger than the sum of its proper divisors (312007385).

16536388543 is an equidigital number, since it uses as much as digits as its factorization.

16536388543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312007384.

The product of its digits is 6220800, while the sum is 52.

The spelling of 16536388543 in words is "sixteen billion, five hundred thirty-six million, three hundred eighty-eight thousand, five hundred forty-three".