16443536672543 has 4 divisors (see below), whose sum is σ = 16443645078960. Its totient is φ = 16443428266128.

The previous prime is 16443536672539. The next prime is 16443536672557. The reversal of 16443536672543 is 34527663534461.

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 16443536672543 - 2² = 16443536672539 is a prime.

It is a super-3 number, since 3×16443536672543³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16443536672503) 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, 53975363 + ... + 54279156.

It is an arithmetic number, because the mean of its divisors is an integer number (4110911269740).

Almost surely, 2^{16443536672543} is an apocalyptic number.

16443536672543 is a deficient number, since it is larger than the sum of its proper divisors (108406417).

16443536672543 is a wasteful number, since it uses less digits than its factorization.

16443536672543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108406416.

The product of its digits is 130636800, while the sum is 59.

The spelling of 16443536672543 in words is "sixteen trillion, four hundred forty-three billion, five hundred thirty-six million, six hundred seventy-two thousand, five hundred forty-three".