378441565144949 has 2 divisors, whose sum is σ = 378441565144950. Its totient is φ = 378441565144948.

The previous prime is 378441565144859. The next prime is 378441565145047. The reversal of 378441565144949 is 949441565144873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280597676102500 + 97843889042449 = 16751050^2 + 9891607^2 .

It is a cyclic number.

It is not a de Polignac number, because 378441565144949 - 2²⁰ = 378441564096373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378441565144849) 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, 189220782572474 + 189220782572475.

It is an arithmetic number, because the mean of its divisors is an integer number (189220782572475).

Almost surely, 2^{378441565144949} is an apocalyptic number.

It is an amenable number.

378441565144949 is a deficient number, since it is larger than the sum of its proper divisors (1).

378441565144949 is an equidigital number, since it uses as much as digits as its factorization.

378441565144949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2090188800, while the sum is 74.

The spelling of 378441565144949 in words is "three hundred seventy-eight trillion, four hundred forty-one billion, five hundred sixty-five million, one hundred forty-four thousand, nine hundred forty-nine".