25252555525 has 6 divisors (see below), whose sum is σ = 31313168882. Its totient is φ = 20202044400.

The previous prime is 25252555513. The next prime is 25252555529. The reversal of 25252555525 is 52555525252.

It can be written as a sum of positive squares in 3 ways, for example, as 11607649 + 25240947876 = 3407^2 + 158874^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25252555525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25252555529) 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 5 ways as a sum of consecutive naturals, for example, 505051086 + ... + 505051135.

Almost surely, 2^25252555525 is an apocalyptic number.

25252555525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25252555525 is a deficient number, since it is larger than the sum of its proper divisors (6060613357).

25252555525 is a wasteful number, since it uses less digits than its factorization.

25252555525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010102231 (or 1010102226 counting only the distinct ones).

The product of its digits is 1250000, while the sum is 43.

The spelling of 25252555525 in words is "twenty-five billion, two hundred fifty-two million, five hundred fifty-five thousand, five hundred twenty-five".