1299453607649 has 2 divisors, whose sum is σ = 1299453607650. Its totient is φ = 1299453607648.

The previous prime is 1299453607633. The next prime is 1299453607657. The reversal of 1299453607649 is 9467063549921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168275633424 + 131177974225 = 1080868^2 + 362185^2 .

It is an emirp because it is prime and its reverse (9467063549921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1299453607649 - 2⁴ = 1299453607633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1299453607549) 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, 649726803824 + 649726803825.

It is an arithmetic number, because the mean of its divisors is an integer number (649726803825).

Almost surely, 2^{1299453607649} is an apocalyptic number.

It is an amenable number.

1299453607649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299453607649 is an equidigital number, since it uses as much as digits as its factorization.

1299453607649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88179840, while the sum is 65.

The spelling of 1299453607649 in words is "one trillion, two hundred ninety-nine billion, four hundred fifty-three million, six hundred seven thousand, six hundred forty-nine".