28563530636 has 24 divisors (see below), whose sum is σ = 50540693280. Its totient is φ = 14123561472.

The previous prime is 28563530617. The next prime is 28563530659. The reversal of 28563530636 is 63603536582.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483866 + ... + 539678.

It is an arithmetic number, because the mean of its divisors is an integer number (2105862220).

Almost surely, 2^28563530636 is an apocalyptic number.

It is an amenable number.

28563530636 is a deficient number, since it is larger than the sum of its proper divisors (21977162644).

28563530636 is a wasteful number, since it uses less digits than its factorization.

28563530636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57233 (or 57231 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 28563530636 in words is "twenty-eight billion, five hundred sixty-three million, five hundred thirty thousand, six hundred thirty-six".