28216334543 has 4 divisors (see below), whose sum is σ = 28217755488. Its totient is φ = 28214913600.

The previous prime is 28216334483. The next prime is 28216334551. The reversal of 28216334543 is 34543361282.

It is a happy number.

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 28216334543 - 2⁸ = 28216334287 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 28216334543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28216534543) 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, 680258 + ... + 720543.

It is an arithmetic number, because the mean of its divisors is an integer number (7054438872).

Almost surely, 2^28216334543 is an apocalyptic number.

28216334543 is a deficient number, since it is larger than the sum of its proper divisors (1420945).

28216334543 is a wasteful number, since it uses less digits than its factorization.

28216334543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420944.

The product of its digits is 414720, while the sum is 41.

The spelling of 28216334543 in words is "twenty-eight billion, two hundred sixteen million, three hundred thirty-four thousand, five hundred forty-three".