381377341691 has 2 divisors, whose sum is σ = 381377341692. Its totient is φ = 381377341690.

The previous prime is 381377341687. The next prime is 381377341739. The reversal of 381377341691 is 196143773183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381377341691 - 2² = 381377341687 is a prime.

It is not a weakly prime, because it can be changed into another prime (381377341391) 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, 190688670845 + 190688670846.

It is an arithmetic number, because the mean of its divisors is an integer number (190688670846).

Almost surely, 2^381377341691 is an apocalyptic number.

381377341691 is a deficient number, since it is larger than the sum of its proper divisors (1).

381377341691 is an equidigital number, since it uses as much as digits as its factorization.

381377341691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The spelling of 381377341691 in words is "three hundred eighty-one billion, three hundred seventy-seven million, three hundred forty-one thousand, six hundred ninety-one".