201143005644 has 96 divisors (see below), whose sum is σ = 539646016000. Its totient is φ = 57120007680.

The previous prime is 201143005603. The next prime is 201143005649. The reversal of 201143005644 is 446500341102.

It is not an unprimeable number, because it can be changed into a prime (201143005649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46354827 + ... + 46359165.

Almost surely, 2^201143005644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201143005644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269823008000).

201143005644 is an abundant number, since it is smaller than the sum of its proper divisors (338503010356).

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

201143005644 is a wasteful number, since it uses less digits than its factorization.

201143005644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583 (or 7581 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 201143005644 its reverse (446500341102), we get a palindrome (647643346746).

The spelling of 201143005644 in words is "two hundred one billion, one hundred forty-three million, five thousand, six hundred forty-four".