25500028025 has 12 divisors (see below), whose sum is σ = 31933107564. Its totient is φ = 20198040000.

The previous prime is 25500028009. The next prime is 25500028031. The reversal of 25500028025 is 52082000552.

It can be written as a sum of positive squares in 6 ways, for example, as 4898880064 + 20601147961 = 69992^2 + 143531^2 .

It is not a de Polignac number, because 25500028025 - 2⁴ = 25500028009 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5046986 + ... + 5052035.

It is an arithmetic number, because the mean of its divisors is an integer number (2661092297).

Almost surely, 2^25500028025 is an apocalyptic number.

25500028025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25500028025 is a deficient number, since it is larger than the sum of its proper divisors (6433079539).

25500028025 is a wasteful number, since it uses less digits than its factorization.

25500028025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10099132 (or 10099127 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 25500028025 its reverse (52082000552), we get a palindrome (77582028577).

The spelling of 25500028025 in words is "twenty-five billion, five hundred million, twenty-eight thousand, twenty-five".