2561425125 has 64 divisors (see below), whose sum is σ = 4901105664. Its totient is φ = 1163726400.

The previous prime is 2561425121. The next prime is 2561425157. The reversal of 2561425125 is 5215241652.

It is not a de Polignac number, because 2561425125 - 2² = 2561425121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561425121) 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 63 ways as a sum of consecutive naturals, for example, 435454 + ... + 441296.

It is an arithmetic number, because the mean of its divisors is an integer number (76579776).

Almost surely, 2^2561425125 is an apocalyptic number.

2561425125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2561425125 is a deficient number, since it is larger than the sum of its proper divisors (2339680539).

2561425125 is a wasteful number, since it uses less digits than its factorization.

2561425125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035 (or 6025 counting only the distinct ones).

The product of its digits is 24000, while the sum is 33.

The square root of 2561425125 is about 50610.5238562100. The cubic root of 2561425125 is about 1368.2345570712.

Adding to 2561425125 its reverse (5215241652), we get a palindrome (7776666777).

The spelling of 2561425125 in words is "two billion, five hundred sixty-one million, four hundred twenty-five thousand, one hundred twenty-five".