25453435457 has 2 divisors, whose sum is σ = 25453435458. Its totient is φ = 25453435456.

The previous prime is 25453435439. The next prime is 25453435463. The reversal of 25453435457 is 75453435452.

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., 16353038641 + 9100396816 = 127879^2 + 95396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25453435457 is a prime.

It is not a weakly prime, because it can be changed into another prime (25453435157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12726717728 + 12726717729.

It is an arithmetic number, because the mean of its divisors is an integer number (12726717729).

Almost surely, 2^25453435457 is an apocalyptic number.

It is an amenable number.

25453435457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25453435457 is an equidigital number, since it uses as much as digits as its factorization.

25453435457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040000, while the sum is 47.

The spelling of 25453435457 in words is "twenty-five billion, four hundred fifty-three million, four hundred thirty-five thousand, four hundred fifty-seven".