25405135256120 has 16 divisors (see below), whose sum is σ = 57161554326360. Its totient is φ = 10162054102432.

The previous prime is 25405135256113. The next prime is 25405135256129. The reversal of 25405135256120 is 2165253150452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25405135256129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317564190662 + ... + 317564190741.

Almost surely, 2^{25405135256120} is an apocalyptic number.

25405135256120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25405135256120 is an abundant number, since it is smaller than the sum of its proper divisors (31756419070240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25405135256120 is a wasteful number, since it uses less digits than its factorization.

25405135256120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635128381414 (or 635128381410 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 25405135256120 in words is "twenty-five trillion, four hundred five billion, one hundred thirty-five million, two hundred fifty-six thousand, one hundred twenty".