1298319358649 has 2 divisors, whose sum is σ = 1298319358650. Its totient is φ = 1298319358648.

The previous prime is 1298319358597. The next prime is 1298319358657. The reversal of 1298319358649 is 9468539138921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 909816468649 + 388502890000 = 953843^2 + 623300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1298319358649 is a prime.

It is a super-2 number, since 2×1298319358649² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1298319358249) 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, 649159679324 + 649159679325.

It is an arithmetic number, because the mean of its divisors is an integer number (649159679325).

Almost surely, 2^{1298319358649} is an apocalyptic number.

It is an amenable number.

1298319358649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298319358649 is an equidigital number, since it uses as much as digits as its factorization.

1298319358649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100776960, while the sum is 68.

The spelling of 1298319358649 in words is "one trillion, two hundred ninety-eight billion, three hundred nineteen million, three hundred fifty-eight thousand, six hundred forty-nine".