25442831525 has 12 divisors (see below), whose sum is σ = 32144379012. Its totient is φ = 19970221440.

The previous prime is 25442831509. The next prime is 25442831677. The reversal of 25442831525 is 52513824452.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 667489 + 25442164036 = 817^2 + 159506^2 .

It is not a de Polignac number, because 25442831525 - 2⁴ = 25442831509 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 9599744 + ... + 9602393.

It is an arithmetic number, because the mean of its divisors is an integer number (2678698251).

Almost surely, 2^25442831525 is an apocalyptic number.

25442831525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25442831525 is a deficient number, since it is larger than the sum of its proper divisors (6701547487).

25442831525 is a wasteful number, since it uses less digits than its factorization.

25442831525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202200 (or 19202195 counting only the distinct ones).

The product of its digits is 384000, while the sum is 41.

The spelling of 25442831525 in words is "twenty-five billion, four hundred forty-two million, eight hundred thirty-one thousand, five hundred twenty-five".