1443643438216 has 96 divisors (see below), whose sum is σ = 3337007851800. Its totient is φ = 581781903360.

The previous prime is 1443643438213. The next prime is 1443643438219. The reversal of 1443643438216 is 6128343463441.

It is an interprime number because it is at equal distance from previous prime (1443643438213) and next prime (1443643438219).

It can be written as a sum of positive squares in 4 ways, for example, as 624817526116 + 818825912100 = 790454^2 + 904890^2 .

It is a super-2 number, since 2×1443643438216² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 1443643438216.

It is not an unprimeable number, because it can be changed into a prime (1443643438213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7292706 + ... + 7488046.

Almost surely, 2^{1443643438216} 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 1443643438216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1668503925900).

1443643438216 is an abundant number, since it is smaller than the sum of its proper divisors (1893364413584).

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

1443643438216 is a wasteful number, since it uses less digits than its factorization.

1443643438216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196487 (or 196476 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 49.

The spelling of 1443643438216 in words is "one trillion, four hundred forty-three billion, six hundred forty-three million, four hundred thirty-eight thousand, two hundred sixteen".