381191695577197 has 2 divisors, whose sum is σ = 381191695577198. Its totient is φ = 381191695577196.

The previous prime is 381191695577183. The next prime is 381191695577221. The reversal of 381191695577197 is 791775596191183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260682369126921 + 120509326450276 = 16145661^2 + 10977674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381191695577197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381191695577597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190595847788598 + 190595847788599.

It is an arithmetic number, because the mean of its divisors is an integer number (190595847788599).

Almost surely, 2^{381191695577197} is an apocalyptic number.

It is an amenable number.

381191695577197 is a deficient number, since it is larger than the sum of its proper divisors (1).

381191695577197 is an equidigital number, since it uses as much as digits as its factorization.

381191695577197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900169200, while the sum is 79.

The spelling of 381191695577197 in words is "three hundred eighty-one trillion, one hundred ninety-one billion, six hundred ninety-five million, five hundred seventy-seven thousand, one hundred ninety-seven".