28055300052805 has 4 divisors (see below), whose sum is σ = 33666360063372. Its totient is φ = 22444240042240.

The previous prime is 28055300052743. The next prime is 28055300052847. The reversal of 28055300052805 is 50825000355082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17450729243649 + 10604570809156 = 4177407^2 + 3256466^2 .

It is not a de Polignac number, because 28055300052805 - 2¹³ = 28055300044613 is a prime.

It is a super-2 number, since 2×28055300052805² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805530005276 + ... + 2805530005285.

It is an arithmetic number, because the mean of its divisors is an integer number (8416590015843).

Almost surely, 2^{28055300052805} is an apocalyptic number.

It is an amenable number.

28055300052805 is a deficient number, since it is larger than the sum of its proper divisors (5611060010567).

28055300052805 is an equidigital number, since it uses as much as digits as its factorization.

28055300052805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611060010566.

The product of its (nonzero) digits is 480000, while the sum is 43.

The spelling of 28055300052805 in words is "twenty-eight trillion, fifty-five billion, three hundred million, fifty-two thousand, eight hundred five".