205163644523 has 2 divisors, whose sum is σ = 205163644524. Its totient is φ = 205163644522.

The previous prime is 205163644487. The next prime is 205163644531. The reversal of 205163644523 is 325446361502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 205163644523 - 2¹⁶ = 205163578987 is a prime.

It is not a weakly prime, because it can be changed into another prime (205163644423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102581822261 + 102581822262.

It is an arithmetic number, because the mean of its divisors is an integer number (102581822262).

Almost surely, 2^205163644523 is an apocalyptic number.

205163644523 is a deficient number, since it is larger than the sum of its proper divisors (1).

205163644523 is an equidigital number, since it uses as much as digits as its factorization.

205163644523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 205163644523 in words is "two hundred five billion, one hundred sixty-three million, six hundred forty-four thousand, five hundred twenty-three".