25252525252525 has 24 divisors (see below), whose sum is σ = 31450946832000. Its totient is φ = 20113143523200.

The previous prime is 25252525252499. The next prime is 25252525252561. The reversal of 25252525252525 is 52525252525252.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-25252525252525 is a prime.

It is an alternating number because its digits alternate between even and odd.

25252525252525 is an undulating number in base 10.

25252525252525 is a modest number, since divided by 25252525 gives 252525 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27323230 + ... + 28232320.

It is an arithmetic number, because the mean of its divisors is an integer number (1310456118000).

Almost surely, 2^{25252525252525} is an apocalyptic number.

25252525252525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25252525252525 is a deficient number, since it is larger than the sum of its proper divisors (6198421579475).

25252525252525 is a wasteful number, since it uses less digits than its factorization.

25252525252525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913989 (or 913984 counting only the distinct ones).

The product of its digits is 10000000, while the sum is 49.

Adding to 25252525252525 its reverse (52525252525252), we get a palindrome (77777777777777).

It can be divided in two parts, 2525252 and 5252525, that added together give a palindrome (7777777).

The spelling of 25252525252525 in words is "twenty-five trillion, two hundred fifty-two billion, five hundred twenty-five million, two hundred fifty-two thousand, five hundred twenty-five".