205505200145 has 16 divisors (see below), whose sum is σ = 298414274688. Its totient is φ = 132628565760.

The previous prime is 205505200141. The next prime is 205505200157. The reversal of 205505200145 is 541002505502.

It is not a de Polignac number, because 205505200145 - 2² = 205505200141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (205505200141) 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, 172692851 + ... + 172694040.

It is an arithmetic number, because the mean of its divisors is an integer number (18650892168).

Almost surely, 2^205505200145 is an apocalyptic number.

It is an amenable number.

205505200145 is a deficient number, since it is larger than the sum of its proper divisors (92909074543).

205505200145 is a wasteful number, since it uses less digits than its factorization.

205505200145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345386920.

The product of its (nonzero) digits is 10000, while the sum is 29.

Adding to 205505200145 its reverse (541002505502), we get a palindrome (746507705647).

The spelling of 205505200145 in words is "two hundred five billion, five hundred five million, two hundred thousand, one hundred forty-five".