381598145660197 has 2 divisors, whose sum is σ = 381598145660198. Its totient is φ = 381598145660196.

The previous prime is 381598145660153. The next prime is 381598145660227. The reversal of 381598145660197 is 791066541895183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360006566397921 + 21591579262276 = 18973839^2 + 4646674^2 .

It is a cyclic number.

It is not a de Polignac number, because 381598145660197 - 2³⁹ = 381048389846309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381598145660117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190799072830098 + 190799072830099.

It is an arithmetic number, because the mean of its divisors is an integer number (190799072830099).

Almost surely, 2^{381598145660197} is an apocalyptic number.

It is an amenable number.

381598145660197 is a deficient number, since it is larger than the sum of its proper divisors (1).

381598145660197 is an equidigital number, since it uses as much as digits as its factorization.

381598145660197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 391910400, while the sum is 73.

The spelling of 381598145660197 in words is "three hundred eighty-one trillion, five hundred ninety-eight billion, one hundred forty-five million, six hundred sixty thousand, one hundred ninety-seven".