28568774529 has 27 divisors (see below), whose sum is σ = 41746857633. Its totient is φ = 18826457832.

The previous prime is 28568774527. The next prime is 28568774543. The reversal of 28568774529 is 92547786582.

The square root of 28568774529 is 169023.

It is a perfect power (a square), and thus also a powerful number.

28568774529 is a `hidden beast` number, since 2 + 8 + 568 + 7 + 7 + 45 + 29 = 666.

It is not a de Polignac number, because 28568774529 - 2¹ = 28568774527 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28568774527) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 52227834 + ... + 52228380.

Almost surely, 2^28568774529 is an apocalyptic number.

28568774529 is the 169023-rd square number.

28568774529 is the 84512-nd centered octagonal number.

It is an amenable number.

28568774529 is a deficient number, since it is larger than the sum of its proper divisors (13178083104).

28568774529 is an frugal number, since it uses more digits than its factorization.

28568774529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 653 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 28568774529 in words is "twenty-eight billion, five hundred sixty-eight million, seven hundred seventy-four thousand, five hundred twenty-nine".