28543955566 has 16 divisors (see below), whose sum is σ = 48934717056. Its totient is φ = 12232568376.

The previous prime is 28543955543. The next prime is 28543955579. The reversal of 28543955566 is 66555934582.

It is a self number, because there is not a number n which added to its sum of digits gives 28543955566.

It is a congruent number.

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, 477265 + ... + 533731.

It is an arithmetic number, because the mean of its divisors is an integer number (3058419816).

Almost surely, 2^28543955566 is an apocalyptic number.

28543955566 is a deficient number, since it is larger than the sum of its proper divisors (20390761490).

28543955566 is a wasteful number, since it uses less digits than its factorization.

28543955566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92583.

The product of its digits is 38880000, while the sum is 58.

The spelling of 28543955566 in words is "twenty-eight billion, five hundred forty-three million, nine hundred fifty-five thousand, five hundred sixty-six".