25503617088881 has 2 divisors, whose sum is σ = 25503617088882. Its totient is φ = 25503617088880.

The previous prime is 25503617088809. The next prime is 25503617088893. The reversal of 25503617088881 is 18888071630552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25265903310400 + 237713778481 = 5026520^2 + 487559^2 .

It is a cyclic number.

It is not a de Polignac number, because 25503617088881 - 2²² = 25503612894577 is a prime.

It is a super-2 number, since 2×25503617088881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25503617088281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751808544440 + 12751808544441.

It is an arithmetic number, because the mean of its divisors is an integer number (12751808544441).

Almost surely, 2^{25503617088881} is an apocalyptic number.

It is an amenable number.

25503617088881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25503617088881 is an equidigital number, since it uses as much as digits as its factorization.

25503617088881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25804800, while the sum is 62.

The spelling of 25503617088881 in words is "twenty-five trillion, five hundred three billion, six hundred seventeen million, eighty-eight thousand, eight hundred eighty-one".