28518663205 has 16 divisors (see below), whose sum is σ = 34880025600. Its totient is φ = 22376805568.

The previous prime is 28518663193. The next prime is 28518663253. The reversal of 28518663205 is 50236681582.

It is a cyclic number.

It is not a de Polignac number, because 28518663205 - 2⁷ = 28518663077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831996 + ... + 865594.

It is an arithmetic number, because the mean of its divisors is an integer number (2180001600).

Almost surely, 2^28518663205 is an apocalyptic number.

It is an amenable number.

28518663205 is a deficient number, since it is larger than the sum of its proper divisors (6361362395).

28518663205 is a wasteful number, since it uses less digits than its factorization.

28518663205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36860.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 28518663205 in words is "twenty-eight billion, five hundred eighteen million, six hundred sixty-three thousand, two hundred five".