28565816572 has 6 divisors (see below), whose sum is σ = 49990179008. Its totient is φ = 14282908284.

The previous prime is 28565816549. The next prime is 28565816593. The reversal of 28565816572 is 27561856582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570727068 + ... + 3570727075.

Almost surely, 2^28565816572 is an apocalyptic number.

It is an amenable number.

28565816572 is a deficient number, since it is larger than the sum of its proper divisors (21424362436).

28565816572 is a wasteful number, since it uses less digits than its factorization.

28565816572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141454147 (or 7141454145 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 55.

The spelling of 28565816572 in words is "twenty-eight billion, five hundred sixty-five million, eight hundred sixteen thousand, five hundred seventy-two".