263012323649 has 2 divisors, whose sum is σ = 263012323650. Its totient is φ = 263012323648.

The previous prime is 263012323619. The next prime is 263012323687. The reversal of 263012323649 is 946323210362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254399184400 + 8613139249 = 504380^2 + 92807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263012323649 is a prime.

It is not a weakly prime, because it can be changed into another prime (263012323619) 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, 131506161824 + 131506161825.

It is an arithmetic number, because the mean of its divisors is an integer number (131506161825).

Almost surely, 2^263012323649 is an apocalyptic number.

It is an amenable number.

263012323649 is a deficient number, since it is larger than the sum of its proper divisors (1).

263012323649 is an equidigital number, since it uses as much as digits as its factorization.

263012323649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 41.

The spelling of 263012323649 in words is "two hundred sixty-three billion, twelve million, three hundred twenty-three thousand, six hundred forty-nine".