25688919674881 has 2 divisors, whose sum is σ = 25688919674882. Its totient is φ = 25688919674880.

The previous prime is 25688919674827. The next prime is 25688919674893. The reversal of 25688919674881 is 18847691988652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14833212634881 + 10855707040000 = 3851391^2 + 3294800^2 .

It is a cyclic number.

It is not a de Polignac number, because 25688919674881 - 2⁷ = 25688919674753 is a prime.

It is a super-2 number, since 2×25688919674881² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25688919674795 and 25688919674804.

It is not a weakly prime, because it can be changed into another prime (25688919674281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12844459837440 + 12844459837441.

It is an arithmetic number, because the mean of its divisors is an integer number (12844459837441).

Almost surely, 2^{25688919674881} is an apocalyptic number.

It is an amenable number.

25688919674881 is a deficient number, since it is larger than the sum of its proper divisors (1).

25688919674881 is an equidigital number, since it uses as much as digits as its factorization.

25688919674881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3344302080, while the sum is 82.

The spelling of 25688919674881 in words is "twenty-five trillion, six hundred eighty-eight billion, nine hundred nineteen million, six hundred seventy-four thousand, eight hundred eighty-one".