1315663155649 has 2 divisors, whose sum is σ = 1315663155650. Its totient is φ = 1315663155648.

The previous prime is 1315663155641. The next prime is 1315663155659. The reversal of 1315663155649 is 9465513665131.

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., 767826330049 + 547836825600 = 876257^2 + 740160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1315663155649 - 2³ = 1315663155641 is a prime.

It is a super-2 number, since 2×1315663155649² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1315663155649.

It is not a weakly prime, because it can be changed into another prime (1315663155641) 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, 657831577824 + 657831577825.

It is an arithmetic number, because the mean of its divisors is an integer number (657831577825).

Almost surely, 2^{1315663155649} is an apocalyptic number.

It is an amenable number.

1315663155649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315663155649 is an equidigital number, since it uses as much as digits as its factorization.

1315663155649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748000, while the sum is 55.

The spelling of 1315663155649 in words is "one trillion, three hundred fifteen billion, six hundred sixty-three million, one hundred fifty-five thousand, six hundred forty-nine".