28508528525 has 6 divisors (see below), whose sum is σ = 35350575402. Its totient is φ = 22806822800.

The previous prime is 28508528491. The next prime is 28508528533. The reversal of 28508528525 is 52582580582.

It can be written as a sum of positive squares in 3 ways, for example, as 8232477289 + 20276051236 = 90733^2 + 142394^2 .

It is not a de Polignac number, because 28508528525 - 2¹⁴ = 28508512141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570170546 + ... + 570170595.

It is an arithmetic number, because the mean of its divisors is an integer number (5891762567).

Almost surely, 2^28508528525 is an apocalyptic number.

28508528525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28508528525 is a deficient number, since it is larger than the sum of its proper divisors (6842046877).

28508528525 is a wasteful number, since it uses less digits than its factorization.

28508528525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140341151 (or 1140341146 counting only the distinct ones).

The product of its (nonzero) digits is 2560000, while the sum is 50.

The spelling of 28508528525 in words is "twenty-eight billion, five hundred eight million, five hundred twenty-eight thousand, five hundred twenty-five".