25307880449 has 2 divisors, whose sum is σ = 25307880450. Its totient is φ = 25307880448.

The previous prime is 25307880439. The next prime is 25307880517. The reversal of 25307880449 is 94408870352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24439694224 + 868186225 = 156332^2 + 29465^2 .

It is a cyclic number.

It is not a de Polignac number, because 25307880449 - 2¹⁶ = 25307814913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25307880397 and 25307880406.

It is not a weakly prime, because it can be changed into another prime (25307880439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12653940224 + 12653940225.

It is an arithmetic number, because the mean of its divisors is an integer number (12653940225).

Almost surely, 2^25307880449 is an apocalyptic number.

It is an amenable number.

25307880449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25307880449 is an equidigital number, since it uses as much as digits as its factorization.

25307880449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 25307880449 in words is "twenty-five billion, three hundred seven million, eight hundred eighty thousand, four hundred forty-nine".