25681211688959 has 2 divisors, whose sum is σ = 25681211688960. Its totient is φ = 25681211688958.

The previous prime is 25681211688943. The next prime is 25681211688983. The reversal of 25681211688959 is 95988611218652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25681211688959 - 2⁴ = 25681211688943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25681211688892 and 25681211688901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25681211685959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840605844479 + 12840605844480.

It is an arithmetic number, because the mean of its divisors is an integer number (12840605844480).

Almost surely, 2^{25681211688959} is an apocalyptic number.

25681211688959 is a deficient number, since it is larger than the sum of its proper divisors (1).

25681211688959 is an equidigital number, since it uses as much as digits as its factorization.

25681211688959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149299200, while the sum is 71.

The spelling of 25681211688959 in words is "twenty-five trillion, six hundred eighty-one billion, two hundred eleven million, six hundred eighty-eight thousand, nine hundred fifty-nine".