381464663609 has 2 divisors, whose sum is σ = 381464663610. Its totient is φ = 381464663608.

The previous prime is 381464663561. The next prime is 381464663623. The reversal of 381464663609 is 906366464183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372679725625 + 8784937984 = 610475^2 + 93728^2 .

It is an emirp because it is prime and its reverse (906366464183) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381464663609 is a prime.

It is not a weakly prime, because it can be changed into another prime (381464663809) 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, 190732331804 + 190732331805.

It is an arithmetic number, because the mean of its divisors is an integer number (190732331805).

Almost surely, 2^381464663609 is an apocalyptic number.

It is an amenable number.

381464663609 is a deficient number, since it is larger than the sum of its proper divisors (1).

381464663609 is an equidigital number, since it uses as much as digits as its factorization.

381464663609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13436928, while the sum is 56.

The spelling of 381464663609 in words is "three hundred eighty-one billion, four hundred sixty-four million, six hundred sixty-three thousand, six hundred nine".