28809718543 has 2 divisors, whose sum is σ = 28809718544. Its totient is φ = 28809718542.

The previous prime is 28809718541. The next prime is 28809718573. The reversal of 28809718543 is 34581790882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28809718543 - 2¹ = 28809718541 is a prime.

Together with 28809718541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28809718541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404859271 + 14404859272.

It is an arithmetic number, because the mean of its divisors is an integer number (14404859272).

Almost surely, 2^28809718543 is an apocalyptic number.

28809718543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28809718543 is an equidigital number, since it uses as much as digits as its factorization.

28809718543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 28809718543 in words is "twenty-eight billion, eight hundred nine million, seven hundred eighteen thousand, five hundred forty-three".