1378313549399 has 2 divisors, whose sum is σ = 1378313549400. Its totient is φ = 1378313549398.

The previous prime is 1378313549381. The next prime is 1378313549443. The reversal of 1378313549399 is 9939453138731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378313549399 - 2²⁴ = 1378296772183 is a prime.

It is a super-2 number, since 2×1378313549399² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1378313549309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689156774699 + 689156774700.

It is an arithmetic number, because the mean of its divisors is an integer number (689156774700).

Almost surely, 2^{1378313549399} is an apocalyptic number.

1378313549399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378313549399 is an equidigital number, since it uses as much as digits as its factorization.

1378313549399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 65.

The spelling of 1378313549399 in words is "one trillion, three hundred seventy-eight billion, three hundred thirteen million, five hundred forty-nine thousand, three hundred ninety-nine".