201088806644 has 72 divisors (see below), whose sum is σ = 420628146120. Its totient is φ = 83702108160.

The previous prime is 201088806641. The next prime is 201088806679. The reversal of 201088806644 is 446608880102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 79174704400 + 121914102244 = 281380^2 + 349162^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201088806641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25829 + ... + 634700.

It is an arithmetic number, because the mean of its divisors is an integer number (5842057585).

Almost surely, 2^201088806644 is an apocalyptic number.

It is an amenable number.

201088806644 is an abundant number, since it is smaller than the sum of its proper divisors (219539339476).

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

201088806644 is a wasteful number, since it uses less digits than its factorization.

201088806644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660609 (or 660596 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 201088806644 in words is "two hundred one billion, eighty-eight million, eight hundred six thousand, six hundred forty-four".