2565544125 has 16 divisors (see below), whose sum is σ = 4269066048. Its totient is φ = 1368290000.

The previous prime is 2565544117. The next prime is 2565544139. The reversal of 2565544125 is 5214455652.

It is not a de Polignac number, because 2565544125 - 2³ = 2565544117 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3420351 + ... + 3421100.

It is an arithmetic number, because the mean of its divisors is an integer number (266816628).

Almost surely, 2^2565544125 is an apocalyptic number.

2565544125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565544125 is a deficient number, since it is larger than the sum of its proper divisors (1703521923).

2565544125 is an equidigital number, since it uses as much as digits as its factorization.

2565544125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841469 (or 6841459 counting only the distinct ones).

The product of its digits is 240000, while the sum is 39.

The square root of 2565544125 is about 50651.2006274284. The cubic root of 2565544125 is about 1368.9675786806.

Adding to 2565544125 its reverse (5214455652), we get a palindrome (7779999777).

The spelling of 2565544125 in words is "two billion, five hundred sixty-five million, five hundred forty-four thousand, one hundred twenty-five".