205065500071999 has 16 divisors (see below), whose sum is σ = 251729937184000. Its totient is φ = 166519353436632.

The previous prime is 205065500071987. The next prime is 205065500072057. The reversal of 205065500071999 is 999170005560502.

It is not a de Polignac number, because 205065500071999 - 2⁷ = 205065500071871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205065500071799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15733114557 + ... + 15733127590.

It is an arithmetic number, because the mean of its divisors is an integer number (15733121074000).

Almost surely, 2^{205065500071999} is an apocalyptic number.

205065500071999 is a deficient number, since it is larger than the sum of its proper divisors (46664437112001).

205065500071999 is an equidigital number, since it uses as much as digits as its factorization.

205065500071999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31466242187 (or 31466242173 counting only the distinct ones).

The product of its (nonzero) digits is 7654500, while the sum is 58.

The spelling of 205065500071999 in words is "two hundred five trillion, sixty-five billion, five hundred million, seventy-one thousand, nine hundred ninety-nine".