25574406546449 has 2 divisors, whose sum is σ = 25574406546450. Its totient is φ = 25574406546448.

The previous prime is 25574406546389. The next prime is 25574406546473. The reversal of 25574406546449 is 94464560447552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17630492481424 + 7943914065025 = 4198868^2 + 2818495^2 .

It is a cyclic number.

It is not a de Polignac number, because 25574406546449 - 2⁸ = 25574406546193 is a prime.

It is not a weakly prime, because it can be changed into another prime (25574406546049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12787203273224 + 12787203273225.

It is an arithmetic number, because the mean of its divisors is an integer number (12787203273225).

Almost surely, 2^{25574406546449} is an apocalyptic number.

It is an amenable number.

25574406546449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25574406546449 is an equidigital number, since it uses as much as digits as its factorization.

25574406546449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608000, while the sum is 65.

The spelling of 25574406546449 in words is "twenty-five trillion, five hundred seventy-four billion, four hundred six million, five hundred forty-six thousand, four hundred forty-nine".