1319648378317 has 2 divisors, whose sum is σ = 1319648378318. Its totient is φ = 1319648378316.

The previous prime is 1319648378303. The next prime is 1319648378357. The reversal of 1319648378317 is 7138738469131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148538746601 + 171109631716 = 1071699^2 + 413654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1319648378317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319648378357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659824189158 + 659824189159.

It is an arithmetic number, because the mean of its divisors is an integer number (659824189159).

Almost surely, 2^{1319648378317} is an apocalyptic number.

It is an amenable number.

1319648378317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319648378317 is an equidigital number, since it uses as much as digits as its factorization.

1319648378317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 61.

The spelling of 1319648378317 in words is "one trillion, three hundred nineteen billion, six hundred forty-eight million, three hundred seventy-eight thousand, three hundred seventeen".