25453164437 has 2 divisors, whose sum is σ = 25453164438. Its totient is φ = 25453164436.

The previous prime is 25453164397. The next prime is 25453164463. The reversal of 25453164437 is 73446135452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22234984996 + 3218179441 = 149114^2 + 56729^2 .

It is a cyclic number.

It is not a de Polignac number, because 25453164437 - 2⁸ = 25453164181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25453164487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12726582218 + 12726582219.

It is an arithmetic number, because the mean of its divisors is an integer number (12726582219).

Almost surely, 2^25453164437 is an apocalyptic number.

It is an amenable number.

25453164437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25453164437 is an equidigital number, since it uses as much as digits as its factorization.

25453164437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 44.

Adding to 25453164437 its reverse (73446135452), we get a palindrome (98899299889).

The spelling of 25453164437 in words is "twenty-five billion, four hundred fifty-three million, one hundred sixty-four thousand, four hundred thirty-seven".