28565816633 has 2 divisors, whose sum is σ = 28565816634. Its totient is φ = 28565816632.

The previous prime is 28565816603. The next prime is 28565816647. The reversal of 28565816633 is 33661856582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19945065529 + 8620751104 = 141227^2 + 92848^2 .

It is a cyclic number.

It is not a de Polignac number, because 28565816633 - 2²⁴ = 28549039417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28565816603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282908316 + 14282908317.

It is an arithmetic number, because the mean of its divisors is an integer number (14282908317).

Almost surely, 2^28565816633 is an apocalyptic number.

It is an amenable number.

28565816633 is a deficient number, since it is larger than the sum of its proper divisors (1).

28565816633 is an equidigital number, since it uses as much as digits as its factorization.

28565816633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800, while the sum is 53.

The spelling of 28565816633 in words is "twenty-eight billion, five hundred sixty-five million, eight hundred sixteen thousand, six hundred thirty-three".