25544325525 has 24 divisors (see below), whose sum is σ = 42238067424. Its totient is φ = 13622097600.

The previous prime is 25544325451. The next prime is 25544325529. The reversal of 25544325525 is 52552344552.

It is not a de Polignac number, because 25544325525 - 2⁸ = 25544325269 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25544325529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1014387 + ... + 1039263.

It is an arithmetic number, because the mean of its divisors is an integer number (1759919476).

Almost surely, 2^25544325525 is an apocalyptic number.

25544325525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25544325525 is a deficient number, since it is larger than the sum of its proper divisors (16693741899).

25544325525 is a wasteful number, since it uses less digits than its factorization.

25544325525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38581 (or 38576 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 42.

The spelling of 25544325525 in words is "twenty-five billion, five hundred forty-four million, three hundred twenty-five thousand, five hundred twenty-five".