25852825849 has 2 divisors, whose sum is σ = 25852825850. Its totient is φ = 25852825848.

The previous prime is 25852825847. The next prime is 25852825853. The reversal of 25852825849 is 94852825852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13384870249 + 12467955600 = 115693^2 + 111660^2 .

It is a cyclic number.

It is not a de Polignac number, because 25852825849 - 2¹ = 25852825847 is a prime.

Together with 25852825847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 25852825793 and 25852825802.

It is not a weakly prime, because it can be changed into another prime (25852825841) 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, 12926412924 + 12926412925.

It is an arithmetic number, because the mean of its divisors is an integer number (12926412925).

Almost surely, 2^25852825849 is an apocalyptic number.

It is an amenable number.

25852825849 is a deficient number, since it is larger than the sum of its proper divisors (1).

25852825849 is an equidigital number, since it uses as much as digits as its factorization.

25852825849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432000, while the sum is 58.

The spelling of 25852825849 in words is "twenty-five billion, eight hundred fifty-two million, eight hundred twenty-five thousand, eight hundred forty-nine".