25525663453 has 2 divisors, whose sum is σ = 25525663454. Its totient is φ = 25525663452.

The previous prime is 25525663433. The next prime is 25525663459. The reversal of 25525663453 is 35436652552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24372517689 + 1153145764 = 156117^2 + 33958^2 .

It is a cyclic number.

It is not a de Polignac number, because 25525663453 - 2²⁵ = 25492109021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25525663459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12762831726 + 12762831727.

It is an arithmetic number, because the mean of its divisors is an integer number (12762831727).

Almost surely, 2^25525663453 is an apocalyptic number.

It is an amenable number.

25525663453 is a deficient number, since it is larger than the sum of its proper divisors (1).

25525663453 is an equidigital number, since it uses as much as digits as its factorization.

25525663453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 46.

The spelling of 25525663453 in words is "twenty-five billion, five hundred twenty-five million, six hundred sixty-three thousand, four hundred fifty-three".