206147265532391 has 2 divisors, whose sum is σ = 206147265532392. Its totient is φ = 206147265532390.

The previous prime is 206147265532381. The next prime is 206147265532457. The reversal of 206147265532391 is 193235562741602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206147265532391 - 2³⁸ = 205872387625447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206147265532381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103073632766195 + 103073632766196.

It is an arithmetic number, because the mean of its divisors is an integer number (103073632766196).

Almost surely, 2^{206147265532391} is an apocalyptic number.

206147265532391 is a deficient number, since it is larger than the sum of its proper divisors (1).

206147265532391 is an equidigital number, since it uses as much as digits as its factorization.

206147265532391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 206147265532391 in words is "two hundred six trillion, one hundred forty-seven billion, two hundred sixty-five million, five hundred thirty-two thousand, three hundred ninety-one".