25985898225 has 96 divisors (see below), whose sum is σ = 54776494080. Its totient is φ = 11831400000.

The previous prime is 25985898223. The next prime is 25985898229. The reversal of 25985898225 is 52289858952.

25985898225 is a `hidden beast` number, since 25 + 9 + 8 + 589 + 8 + 2 + 25 = 666.

It is not a de Polignac number, because 25985898225 - 2¹ = 25985898223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (25985898223) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 1175020 + ... + 1196930.

It is an arithmetic number, because the mean of its divisors is an integer number (570588480).

Almost surely, 2^25985898225 is an apocalyptic number.

25985898225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25985898225 is an abundant number, since it is smaller than the sum of its proper divisors (28790595855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25985898225 is a wasteful number, since it uses less digits than its factorization.

25985898225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22188 (or 22177 counting only the distinct ones).

The product of its digits is 41472000, while the sum is 63.

The spelling of 25985898225 in words is "twenty-five billion, nine hundred eighty-five million, eight hundred ninety-eight thousand, two hundred twenty-five".