205093446721 has 4 divisors (see below), whose sum is σ = 205094607444. Its totient is φ = 205092286000.

The previous prime is 205093446707. The next prime is 205093446731. The reversal of 205093446721 is 127644390502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 196905187600 + 8188259121 = 443740^2 + 90489^2 .

It is a cyclic number.

It is not a de Polignac number, because 205093446721 - 2⁹ = 205093446209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205093446731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254230 + ... + 689071.

It is an arithmetic number, because the mean of its divisors is an integer number (51273651861).

Almost surely, 2^205093446721 is an apocalyptic number.

It is an amenable number.

205093446721 is a deficient number, since it is larger than the sum of its proper divisors (1160723).

205093446721 is an equidigital number, since it uses as much as digits as its factorization.

205093446721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160722.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 205093446721 in words is "two hundred five billion, ninety-three million, four hundred forty-six thousand, seven hundred twenty-one".