1243323620352 has 704 divisors, whose sum is σ = 4225322419200. Its totient is φ = 357654528000.

The previous prime is 1243323620269. The next prime is 1243323620389. The reversal of 1243323620352 is 2530263233421.

It is a happy number.

1243323620352 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 3 + 23 + 620 + 3 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 538001277 + ... + 538003587.

Almost surely, 2^{1243323620352} is an apocalyptic number.

1243323620352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243323620352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2112661209600).

1243323620352 is an abundant number, since it is smaller than the sum of its proper divisors (2981998798848).

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

1243323620352 is a wasteful number, since it uses less digits than its factorization.

1243323620352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441 (or 2417 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 36.

Adding to 1243323620352 its reverse (2530263233421), we get a palindrome (3773586853773).

The spelling of 1243323620352 in words is "one trillion, two hundred forty-three billion, three hundred twenty-three million, six hundred twenty thousand, three hundred fifty-two".