28555818563 has 8 divisors (see below), whose sum is σ = 28959318720. Its totient is φ = 28154848680.

The previous prime is 28555818509. The next prime is 28555818593. The reversal of 28555818563 is 36581855582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28555818563 - 2⁸ = 28555818307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28555818499 and 28555818508.

It is not an unprimeable number, because it can be changed into a prime (28555818593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609833 + ... + 654986.

It is an arithmetic number, because the mean of its divisors is an integer number (3619914840).

Almost surely, 2^28555818563 is an apocalyptic number.

28555818563 is a deficient number, since it is larger than the sum of its proper divisors (403500157).

28555818563 is a wasteful number, since it uses less digits than its factorization.

28555818563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265137.

The product of its digits is 11520000, while the sum is 56.

The spelling of 28555818563 in words is "twenty-eight billion, five hundred fifty-five million, eight hundred eighteen thousand, five hundred sixty-three".