205352611063991 has 2 divisors, whose sum is σ = 205352611063992. Its totient is φ = 205352611063990.

The previous prime is 205352611063961. The next prime is 205352611064033. The reversal of 205352611063991 is 199360116253502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205352611063991 - 2³⁰ = 205351537322167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205352611063961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102676305531995 + 102676305531996.

It is an arithmetic number, because the mean of its divisors is an integer number (102676305531996).

Almost surely, 2^{205352611063991} is an apocalyptic number.

205352611063991 is a deficient number, since it is larger than the sum of its proper divisors (1).

205352611063991 is an equidigital number, since it uses as much as digits as its factorization.

205352611063991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 205352611063991 in words is "two hundred five trillion, three hundred fifty-two billion, six hundred eleven million, sixty-three thousand, nine hundred ninety-one".