28825227565 has 4 divisors (see below), whose sum is σ = 34590273084. Its totient is φ = 23060182048.

The previous prime is 28825227553. The next prime is 28825227611. The reversal of 28825227565 is 56572252882.

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 3580466569 + 25244760996 = 59837^2 + 158886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28825227565 is a prime.

It is a Duffinian number.

It is a congruent 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, 2882522752 + ... + 2882522761.

It is an arithmetic number, because the mean of its divisors is an integer number (8647568271).

Almost surely, 2^28825227565 is an apocalyptic number.

It is an amenable number.

28825227565 is a deficient number, since it is larger than the sum of its proper divisors (5765045519).

28825227565 is an equidigital number, since it uses as much as digits as its factorization.

28825227565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5765045518.

The product of its digits is 5376000, while the sum is 52.

The spelling of 28825227565 in words is "twenty-eight billion, eight hundred twenty-five million, two hundred twenty-seven thousand, five hundred sixty-five".