28566652817 has 16 divisors (see below), whose sum is σ = 30168230400. Its totient is φ = 26975047680.

The previous prime is 28566652783. The next prime is 28566652819. The reversal of 28566652817 is 71825666582.

It is a cyclic number.

It is not a de Polignac number, because 28566652817 - 2⁶ = 28566652753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28566652819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8867267 + ... + 8870487.

It is an arithmetic number, because the mean of its divisors is an integer number (1885514400).

Almost surely, 2^28566652817 is an apocalyptic number.

It is an amenable number.

28566652817 is a deficient number, since it is larger than the sum of its proper divisors (1601577583).

28566652817 is a wasteful number, since it uses less digits than its factorization.

28566652817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616.

The product of its digits is 9676800, while the sum is 56.

The spelling of 28566652817 in words is "twenty-eight billion, five hundred sixty-six million, six hundred fifty-two thousand, eight hundred seventeen".