25306814641 has 2 divisors, whose sum is σ = 25306814642. Its totient is φ = 25306814640.

The previous prime is 25306814581. The next prime is 25306814671. The reversal of 25306814641 is 14641860352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17333039025 + 7973775616 = 131655^2 + 89296^2 .

It is a cyclic number.

It is not a de Polignac number, because 25306814641 - 2¹⁹ = 25306290353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25306814594 and 25306814603.

It is not a weakly prime, because it can be changed into another prime (25306814671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12653407320 + 12653407321.

It is an arithmetic number, because the mean of its divisors is an integer number (12653407321).

Almost surely, 2^25306814641 is an apocalyptic number.

It is an amenable number.

25306814641 is a deficient number, since it is larger than the sum of its proper divisors (1).

25306814641 is an equidigital number, since it uses as much as digits as its factorization.

25306814641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 25306814641 in words is "twenty-five billion, three hundred six million, eight hundred fourteen thousand, six hundred forty-one".