16543164499 has 4 divisors (see below), whose sum is σ = 16556803936. Its totient is φ = 16529525064.

The previous prime is 16543164493. The next prime is 16543164509. The reversal of 16543164499 is 99446134561.

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 16543164499 - 2⁵ = 16543164467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16543164493) 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, 6817899 + ... + 6820324.

It is an arithmetic number, because the mean of its divisors is an integer number (4139200984).

Almost surely, 2^16543164499 is an apocalyptic number.

16543164499 is a deficient number, since it is larger than the sum of its proper divisors (13639437).

16543164499 is a wasteful number, since it uses less digits than its factorization.

16543164499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13639436.

The product of its digits is 2799360, while the sum is 52.

The spelling of 16543164499 in words is "sixteen billion, five hundred forty-three million, one hundred sixty-four thousand, four hundred ninety-nine".