28061169265 has 4 divisors (see below), whose sum is σ = 33673403124. Its totient is φ = 22448935408.

The previous prime is 28061169247. The next prime is 28061169277. The reversal of 28061169265 is 56296116082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17341465969 + 10719703296 = 131687^2 + 103536^2 .

It is a cyclic number.

It is not a de Polignac number, because 28061169265 - 2⁷ = 28061169137 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806116922 + ... + 2806116931.

It is an arithmetic number, because the mean of its divisors is an integer number (8418350781).

Almost surely, 2^28061169265 is an apocalyptic number.

It is an amenable number.

28061169265 is a deficient number, since it is larger than the sum of its proper divisors (5612233859).

28061169265 is an equidigital number, since it uses as much as digits as its factorization.

28061169265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612233858.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 28061169265 in words is "twenty-eight billion, sixty-one million, one hundred sixty-nine thousand, two hundred sixty-five".