25538533225281 has 12 divisors (see below), whose sum is σ = 36889319900160. Its totient is φ = 17025537679800.

The previous prime is 25538533225279. The next prime is 25538533225339. The reversal of 25538533225281 is 18252233583552.

25538533225281 is a `hidden beast` number, since 2 + 5 + 5 + 3 + 8 + 5 + 332 + 25 + 281 = 666.

It is not a de Polignac number, because 25538533225281 - 2¹ = 25538533225279 is a prime.

It is a super-2 number, since 2×25538533225281² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25538533225181) 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 11 ways as a sum of consecutive naturals, for example, 11519745 + ... + 13556606.

It is an arithmetic number, because the mean of its divisors is an integer number (3074109991680).

Almost surely, 2^{25538533225281} is an apocalyptic number.

It is an amenable number.

25538533225281 is a deficient number, since it is larger than the sum of its proper divisors (11350786674879).

25538533225281 is a wasteful number, since it uses less digits than its factorization.

25538533225281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25189516 (or 25189513 counting only the distinct ones).

The product of its digits is 17280000, while the sum is 54.

The spelling of 25538533225281 in words is "twenty-five trillion, five hundred thirty-eight billion, five hundred thirty-three million, two hundred twenty-five thousand, two hundred eighty-one".