1243433321344 has 64 divisors (see below), whose sum is σ = 2540378156400. Its totient is φ = 605881774080.

The previous prime is 1243433321287. The next prime is 1243433321359. The reversal of 1243433321344 is 4431233343421.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1243433321344² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4629322 + ... + 4890550.

Almost surely, 2^{1243433321344} 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 1243433321344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270189078200).

1243433321344 is an abundant number, since it is smaller than the sum of its proper divisors (1296944835056).

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

1243433321344 is an equidigital number, since it uses as much as digits as its factorization.

1243433321344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262191 (or 262179 counting only the distinct ones).

The product of its digits is 248832, while the sum is 37.

Adding to 1243433321344 its reverse (4431233343421), we get a palindrome (5674666664765).

The spelling of 1243433321344 in words is "one trillion, two hundred forty-three billion, four hundred thirty-three million, three hundred twenty-one thousand, three hundred forty-four".