25550005025 has 12 divisors (see below), whose sum is σ = 31684932972. Its totient is φ = 20438115840.

The previous prime is 25550005021. The next prime is 25550005031. The reversal of 25550005025 is 52050005552.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 412536721 + 25137468304 = 20311^2 + 158548^2 .

It is not a de Polignac number, because 25550005025 - 2² = 25550005021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25550005021) 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 11 ways as a sum of consecutive naturals, for example, 270857 + ... + 352793.

It is an arithmetic number, because the mean of its divisors is an integer number (2640411081).

Almost surely, 2^25550005025 is an apocalyptic number.

25550005025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25550005025 is a deficient number, since it is larger than the sum of its proper divisors (6134927947).

25550005025 is a wasteful number, since it uses less digits than its factorization.

25550005025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94420 (or 94415 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 29.

The spelling of 25550005025 in words is "twenty-five billion, five hundred fifty million, five thousand, twenty-five".