28266831065 has 16 divisors (see below), whose sum is σ = 38612716416. Its totient is φ = 19663881600.

The previous prime is 28266831041. The next prime is 28266831079. The reversal of 28266831065 is 56013866282.

It is not a de Polignac number, because 28266831065 - 2¹⁸ = 28266568921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 11171396 + ... + 11173925.

It is an arithmetic number, because the mean of its divisors is an integer number (2413294776).

Almost surely, 2^28266831065 is an apocalyptic number.

It is an amenable number.

28266831065 is a deficient number, since it is larger than the sum of its proper divisors (10345885351).

28266831065 is a wasteful number, since it uses less digits than its factorization.

28266831065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22345360.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 28266831065 in words is "twenty-eight billion, two hundred sixty-six million, eight hundred thirty-one thousand, sixty-five".