28545638863 has 4 divisors (see below), whose sum is σ = 32623587280. Its totient is φ = 24467690448.

The previous prime is 28545638843. The next prime is 28545638867. The reversal of 28545638863 is 36883654582.

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 28545638863 - 2¹⁷ = 28545507791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28545638798 and 28545638807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545638867) 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, 2038974198 + ... + 2038974211.

It is an arithmetic number, because the mean of its divisors is an integer number (8155896820).

Almost surely, 2^28545638863 is an apocalyptic number.

28545638863 is a deficient number, since it is larger than the sum of its proper divisors (4077948417).

28545638863 is an equidigital number, since it uses as much as digits as its factorization.

28545638863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077948416.

The product of its digits is 33177600, while the sum is 58.

The spelling of 28545638863 in words is "twenty-eight billion, five hundred forty-five million, six hundred thirty-eight thousand, eight hundred sixty-three".