28081471563 has 6 divisors (see below), whose sum is σ = 40562125604. Its totient is φ = 18720981036.

The previous prime is 28081471559. The next prime is 28081471571. The reversal of 28081471563 is 36517418082.

28081471563 is a `hidden beast` number, since 2 + 8 + 0 + 8 + 14 + 71 + 563 = 666.

It is not a de Polignac number, because 28081471563 - 2² = 28081471559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081471543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1560081745 + ... + 1560081762.

Almost surely, 2^28081471563 is an apocalyptic number.

28081471563 is a deficient number, since it is larger than the sum of its proper divisors (12480654041).

28081471563 is a wasteful number, since it uses less digits than its factorization.

28081471563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120163513 (or 3120163510 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 28081471563 in words is "twenty-eight billion, eighty-one million, four hundred seventy-one thousand, five hundred sixty-three".