1319785451399 has 2 divisors, whose sum is σ = 1319785451400. Its totient is φ = 1319785451398.

The previous prime is 1319785451359. The next prime is 1319785451443. The reversal of 1319785451399 is 9931545879131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1319785451399 - 2³⁶ = 1251065974663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1319785451339) 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, 659892725699 + 659892725700.

It is an arithmetic number, because the mean of its divisors is an integer number (659892725700).

Almost surely, 2^{1319785451399} is an apocalyptic number.

1319785451399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1319785451399 is an equidigital number, since it uses as much as digits as its factorization.

1319785451399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 65.

The spelling of 1319785451399 in words is "one trillion, three hundred nineteen billion, seven hundred eighty-five million, four hundred fifty-one thousand, three hundred ninety-nine".