266153063200649 has 2 divisors, whose sum is σ = 266153063200650. Its totient is φ = 266153063200648.

The previous prime is 266153063200639. The next prime is 266153063200699. The reversal of 266153063200649 is 946002360351662.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169206294916624 + 96946768284025 = 13007932^2 + 9846155^2 .

It is a cyclic number.

It is not a de Polignac number, because 266153063200649 - 2³² = 266148768233353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266153063200649.

It is not a weakly prime, because it can be changed into another prime (266153063200639) 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, 133076531600324 + 133076531600325.

It is an arithmetic number, because the mean of its divisors is an integer number (133076531600325).

Almost surely, 2^{266153063200649} is an apocalyptic number.

It is an amenable number.

266153063200649 is a deficient number, since it is larger than the sum of its proper divisors (1).

266153063200649 is an equidigital number, since it uses as much as digits as its factorization.

266153063200649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 53.

The spelling of 266153063200649 in words is "two hundred sixty-six trillion, one hundred fifty-three billion, sixty-three million, two hundred thousand, six hundred forty-nine".