649711727449 has 2 divisors, whose sum is σ = 649711727450. Its totient is φ = 649711727448.

The previous prime is 649711727393. The next prime is 649711727491. The reversal of 649711727449 is 944727117946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348491870224 + 301219857225 = 590332^2 + 548835^2 .

It is a cyclic number.

It is not a de Polignac number, because 649711727449 - 2¹³ = 649711719257 is a prime.

It is not a weakly prime, because it can be changed into another prime (649711727849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324855863724 + 324855863725.

It is an arithmetic number, because the mean of its divisors is an integer number (324855863725).

Almost surely, 2^649711727449 is an apocalyptic number.

It is an amenable number.

649711727449 is a deficient number, since it is larger than the sum of its proper divisors (1).

649711727449 is an equidigital number, since it uses as much as digits as its factorization.

649711727449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21337344, while the sum is 61.

The spelling of 649711727449 in words is "six hundred forty-nine billion, seven hundred eleven million, seven hundred twenty-seven thousand, four hundred forty-nine".