378240685331 has 2 divisors, whose sum is σ = 378240685332. Its totient is φ = 378240685330.

The previous prime is 378240685297. The next prime is 378240685397. The reversal of 378240685331 is 133586042873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378240685331 - 2²² = 378236491027 is a prime.

It is a super-2 number, since 2×378240685331² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378240685331.

It is not a weakly prime, because it can be changed into another prime (378240685631) 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, 189120342665 + 189120342666.

It is an arithmetic number, because the mean of its divisors is an integer number (189120342666).

Almost surely, 2^378240685331 is an apocalyptic number.

378240685331 is a deficient number, since it is larger than the sum of its proper divisors (1).

378240685331 is an equidigital number, since it uses as much as digits as its factorization.

378240685331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 378240685331 in words is "three hundred seventy-eight billion, two hundred forty million, six hundred eighty-five thousand, three hundred thirty-one".