205111310144 has 28 divisors (see below), whose sum is σ = 438326816004. Its totient is φ = 94666758144.

The previous prime is 205111310141. The next prime is 205111310161. The reversal of 205111310144 is 441013111502.

It can be written as a sum of positive squares in 2 ways, for example, as 48206593600 + 156904716544 = 219560^2 + 396112^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205111310141) 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, 123263177 + ... + 123264840.

It is an arithmetic number, because the mean of its divisors is an integer number (15654529143).

Almost surely, 2^205111310144 is an apocalyptic number.

It is an amenable number.

205111310144 is an abundant number, since it is smaller than the sum of its proper divisors (233215505860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205111310144 is a wasteful number, since it uses less digits than its factorization.

205111310144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246528042 (or 246528032 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 205111310144 its reverse (441013111502), we get a palindrome (646124421646).

The spelling of 205111310144 in words is "two hundred five billion, one hundred eleven million, three hundred ten thousand, one hundred forty-four".