381445484544191 has 2 divisors, whose sum is σ = 381445484544192. Its totient is φ = 381445484544190.

The previous prime is 381445484544149. The next prime is 381445484544227. The reversal of 381445484544191 is 191445484544183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381445484544191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381445484844191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190722742272095 + 190722742272096.

It is an arithmetic number, because the mean of its divisors is an integer number (190722742272096).

Almost surely, 2^{381445484544191} is an apocalyptic number.

381445484544191 is a deficient number, since it is larger than the sum of its proper divisors (1).

381445484544191 is an equidigital number, since it uses as much as digits as its factorization.

381445484544191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176947200, while the sum is 65.

The spelling of 381445484544191 in words is "three hundred eighty-one trillion, four hundred forty-five billion, four hundred eighty-four million, five hundred forty-four thousand, one hundred ninety-one".