205601646066191 has 2 divisors, whose sum is σ = 205601646066192. Its totient is φ = 205601646066190.

The previous prime is 205601646066097. The next prime is 205601646066203. The reversal of 205601646066191 is 191660646106502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205601646066191 - 2⁴⁶ = 135232901888527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205601646086191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102800823033095 + 102800823033096.

It is an arithmetic number, because the mean of its divisors is an integer number (102800823033096).

Almost surely, 2^{205601646066191} is an apocalyptic number.

205601646066191 is a deficient number, since it is larger than the sum of its proper divisors (1).

205601646066191 is an equidigital number, since it uses as much as digits as its factorization.

205601646066191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 205601646066191 in words is "two hundred five trillion, six hundred one billion, six hundred forty-six million, sixty-six thousand, one hundred ninety-one".