25446144164449 has 2 divisors, whose sum is σ = 25446144164450. Its totient is φ = 25446144164448.

The previous prime is 25446144164417. The next prime is 25446144164491. The reversal of 25446144164449 is 94446144164452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24210267274449 + 1235876890000 = 4920393^2 + 1111700^2 .

It is a cyclic number.

It is not a de Polignac number, because 25446144164449 - 2⁵ = 25446144164417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25446144164393 and 25446144164402.

It is not a weakly prime, because it can be changed into another prime (25446144167449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12723072082224 + 12723072082225.

It is an arithmetic number, because the mean of its divisors is an integer number (12723072082225).

Almost surely, 2^{25446144164449} is an apocalyptic number.

It is an amenable number.

25446144164449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25446144164449 is an equidigital number, since it uses as much as digits as its factorization.

25446144164449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53084160, while the sum is 58.

The spelling of 25446144164449 in words is "twenty-five trillion, four hundred forty-six billion, one hundred forty-four million, one hundred sixty-four thousand, four hundred forty-nine".