25555050525281 has 8 divisors (see below), whose sum is σ = 27255794551560. Its totient is φ = 23876251583488.

The previous prime is 25555050525217. The next prime is 25555050525283. The reversal of 25555050525281 is 18252505055552.

It can be written as a sum of positive squares in 4 ways, for example, as 14625308733025 + 10929741792256 = 3824305^2 + 3306016^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25555050525281 - 2⁶ = 25555050525217 is a prime.

It is a super-2 number, since 2×25555050525281² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25555050525283) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5486268716 + ... + 5486273373.

It is an arithmetic number, because the mean of its divisors is an integer number (3406974318945).

Almost surely, 2^{25555050525281} is an apocalyptic number.

It is an amenable number.

25555050525281 is a deficient number, since it is larger than the sum of its proper divisors (1700744026279).

25555050525281 is a wasteful number, since it uses less digits than its factorization.

25555050525281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10972542243.

The product of its (nonzero) digits is 5000000, while the sum is 50.

The spelling of 25555050525281 in words is "twenty-five trillion, five hundred fifty-five billion, fifty million, five hundred twenty-five thousand, two hundred eighty-one".