25311311449 has 2 divisors, whose sum is σ = 25311311450. Its totient is φ = 25311311448.

The previous prime is 25311311393. The next prime is 25311311471. The reversal of 25311311449 is 94411311352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25080423424 + 230888025 = 158368^2 + 15195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25311311449 is a prime.

It is not a weakly prime, because it can be changed into another prime (25311311479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12655655724 + 12655655725.

It is an arithmetic number, because the mean of its divisors is an integer number (12655655725).

Almost surely, 2^25311311449 is an apocalyptic number.

It is an amenable number.

25311311449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311311449 is an equidigital number, since it uses as much as digits as its factorization.

25311311449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The spelling of 25311311449 in words is "twenty-five billion, three hundred eleven million, three hundred eleven thousand, four hundred forty-nine".