28530616563 has 12 divisors (see below), whose sum is σ = 41236086528. Its totient is φ = 19008782160.

The previous prime is 28530616561. The next prime is 28530616567. The reversal of 28530616563 is 36561603582.

28530616563 is a `hidden beast` number, since 2 + 8 + 530 + 61 + 6 + 56 + 3 = 666.

It is not a de Polignac number, because 28530616563 - 2¹ = 28530616561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28530616561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 953523 + ... + 982988.

It is an arithmetic number, because the mean of its divisors is an integer number (3436340544).

Almost surely, 2^28530616563 is an apocalyptic number.

28530616563 is a deficient number, since it is larger than the sum of its proper divisors (12705469965).

28530616563 is a wasteful number, since it uses less digits than its factorization.

28530616563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938154 (or 1938151 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 28530616563 in words is "twenty-eight billion, five hundred thirty million, six hundred sixteen thousand, five hundred sixty-three".