25253099449 has 2 divisors, whose sum is σ = 25253099450. Its totient is φ = 25253099448.

The previous prime is 25253099423. The next prime is 25253099453. The reversal of 25253099449 is 94499035252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16354573225 + 8898526224 = 127885^2 + 94332^2 .

It is a cyclic number.

It is not a de Polignac number, because 25253099449 - 2²⁷ = 25118881721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25253099396 and 25253099405.

It is not a weakly prime, because it can be changed into another prime (25253099479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12626549724 + 12626549725.

It is an arithmetic number, because the mean of its divisors is an integer number (12626549725).

Almost surely, 2^25253099449 is an apocalyptic number.

It is an amenable number.

25253099449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25253099449 is an equidigital number, since it uses as much as digits as its factorization.

25253099449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 52.

The spelling of 25253099449 in words is "twenty-five billion, two hundred fifty-three million, ninety-nine thousand, four hundred forty-nine".