205922285487899 has 2 divisors, whose sum is σ = 205922285487900. Its totient is φ = 205922285487898.

The previous prime is 205922285487859. The next prime is 205922285487979. The reversal of 205922285487899 is 998784582229502.

It is a happy number.

It is an a-pointer prime, because the next prime (205922285487979) can be obtained adding 205922285487899 to its sum of digits (80).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205922285487899 - 2¹⁶ = 205922285422363 is a prime.

It is not a weakly prime, because it can be changed into another prime (205922285487859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102961142743949 + 102961142743950.

It is an arithmetic number, because the mean of its divisors is an integer number (102961142743950).

Almost surely, 2^{205922285487899} is an apocalyptic number.

205922285487899 is a deficient number, since it is larger than the sum of its proper divisors (1).

205922285487899 is an equidigital number, since it uses as much as digits as its factorization.

205922285487899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4180377600, while the sum is 80.

The spelling of 205922285487899 in words is "two hundred five trillion, nine hundred twenty-two billion, two hundred eighty-five million, four hundred eighty-seven thousand, eight hundred ninety-nine".