1378841664337 has 2 divisors, whose sum is σ = 1378841664338. Its totient is φ = 1378841664336.

The previous prime is 1378841664313. The next prime is 1378841664397. The reversal of 1378841664337 is 7334661488731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371765658176 + 7076006161 = 1171224^2 + 84119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1378841664337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378841664397) 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, 689420832168 + 689420832169.

It is an arithmetic number, because the mean of its divisors is an integer number (689420832169).

Almost surely, 2^{1378841664337} is an apocalyptic number.

It is an amenable number.

1378841664337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378841664337 is an equidigital number, since it uses as much as digits as its factorization.

1378841664337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 61.

The spelling of 1378841664337 in words is "one trillion, three hundred seventy-eight billion, eight hundred forty-one million, six hundred sixty-four thousand, three hundred thirty-seven".