28552855808503 has 4 divisors (see below), whose sum is σ = 30749229332248. Its totient is φ = 26356482284760.

The previous prime is 28552855808501. The next prime is 28552855808507. The reversal of 28552855808503 is 30580855825582.

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 28552855808503 - 2¹ = 28552855808501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552855808501) 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, 1098186761853 + ... + 1098186761878.

It is an arithmetic number, because the mean of its divisors is an integer number (7687307333062).

Almost surely, 2^{28552855808503} is an apocalyptic number.

28552855808503 is a deficient number, since it is larger than the sum of its proper divisors (2196373523745).

28552855808503 is a wasteful number, since it uses less digits than its factorization.

28552855808503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196373523744.

The product of its (nonzero) digits is 153600000, while the sum is 64.

The spelling of 28552855808503 in words is "twenty-eight trillion, five hundred fifty-two billion, eight hundred fifty-five million, eight hundred eight thousand, five hundred three".