65642555524649 has 2 divisors, whose sum is σ = 65642555524650. Its totient is φ = 65642555524648.

The previous prime is 65642555524633. The next prime is 65642555524669. The reversal of 65642555524649 is 94642555524656.

65642555524649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44753999364649 + 20888556160000 = 6689843^2 + 4570400^2 .

It is a cyclic number.

It is not a de Polignac number, because 65642555524649 - 2⁴ = 65642555524633 is a prime.

It is not a weakly prime, because it can be changed into another prime (65642555524669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32821277762324 + 32821277762325.

It is an arithmetic number, because the mean of its divisors is an integer number (32821277762325).

Almost surely, 2^{65642555524649} is an apocalyptic number.

It is an amenable number.

65642555524649 is a deficient number, since it is larger than the sum of its proper divisors (1).

65642555524649 is an equidigital number, since it uses as much as digits as its factorization.

65642555524649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200000, while the sum is 68.

The spelling of 65642555524649 in words is "sixty-five trillion, six hundred forty-two billion, five hundred fifty-five million, five hundred twenty-four thousand, six hundred forty-nine".