2644188228216 has 24 divisors (see below), whose sum is σ = 7161343118280. Its totient is φ = 881396076048.

The previous prime is 2644188228203. The next prime is 2644188228217. The reversal of 2644188228216 is 6128228814462.

2644188228216 is a `hidden beast` number, since 2 + 6 + 4 + 418 + 8 + 2 + 2 + 8 + 216 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2644188228217) 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 5 ways as a sum of consecutive naturals, for example, 18362418180 + ... + 18362418323.

It is an arithmetic number, because the mean of its divisors is an integer number (298389296595).

Almost surely, 2^{2644188228216} is an apocalyptic number.

It is an amenable number.

2644188228216 is an abundant number, since it is smaller than the sum of its proper divisors (4517154890064).

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

2644188228216 is a wasteful number, since it uses less digits than its factorization.

2644188228216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36724836515 (or 36724836508 counting only the distinct ones).

The product of its digits is 4718592, while the sum is 54.

The spelling of 2644188228216 in words is "two trillion, six hundred forty-four billion, one hundred eighty-eight million, two hundred twenty-eight thousand, two hundred sixteen".