216144443364 has 12 divisors (see below), whose sum is σ = 504337034544. Its totient is φ = 72048147784.

The previous prime is 216144443353. The next prime is 216144443371. The reversal of 216144443364 is 463344441612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9006018462 + ... + 9006018485.

It is an arithmetic number, because the mean of its divisors is an integer number (42028086212).

Almost surely, 2^216144443364 is an apocalyptic number.

It is an amenable number.

216144443364 is an abundant number, since it is smaller than the sum of its proper divisors (288192591180).

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

216144443364 is a wasteful number, since it uses less digits than its factorization.

216144443364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18012036954 (or 18012036952 counting only the distinct ones).

The product of its digits is 663552, while the sum is 42.

Adding to 216144443364 its reverse (463344441612), we get a palindrome (679488884976).

The spelling of 216144443364 in words is "two hundred sixteen billion, one hundred forty-four million, four hundred forty-three thousand, three hundred sixty-four".