387168242861809 has 2 divisors, whose sum is σ = 387168242861810. Its totient is φ = 387168242861808.

The previous prime is 387168242861759. The next prime is 387168242861819. The reversal of 387168242861809 is 908168242861783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 274264336221184 + 112903906640625 = 16560928^2 + 10625625^2 .

It is a cyclic number.

It is not a de Polignac number, because 387168242861809 - 2¹⁹ = 387168242337521 is a prime.

It is not a weakly prime, because it can be changed into another prime (387168242861819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193584121430904 + 193584121430905.

It is an arithmetic number, because the mean of its divisors is an integer number (193584121430905).

Almost surely, 2^{387168242861809} is an apocalyptic number.

It is an amenable number.

387168242861809 is a deficient number, since it is larger than the sum of its proper divisors (1).

387168242861809 is an equidigital number, since it uses as much as digits as its factorization.

387168242861809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 445906944, while the sum is 73.

The spelling of 387168242861809 in words is "three hundred eighty-seven trillion, one hundred sixty-eight billion, two hundred forty-two million, eight hundred sixty-one thousand, eight hundred nine".