201044320409 has 4 divisors (see below), whose sum is σ = 202393611300. Its totient is φ = 199695029520.

The previous prime is 201044320403. The next prime is 201044320447. The reversal of 201044320409 is 904023440102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57721504009 + 143322816400 = 240253^2 + 378580^2 .

It is a cyclic number.

It is not a de Polignac number, because 201044320409 - 2²⁰ = 201043271833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201044320403) 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, 674645222 + ... + 674645519.

It is an arithmetic number, because the mean of its divisors is an integer number (50598402825).

Almost surely, 2^201044320409 is an apocalyptic number.

It is an amenable number.

201044320409 is a deficient number, since it is larger than the sum of its proper divisors (1349290891).

201044320409 is a wasteful number, since it uses less digits than its factorization.

201044320409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349290890.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 201044320409 in words is "two hundred one billion, forty-four million, three hundred twenty thousand, four hundred nine".