323440402204144 has 160 divisors (see below), whose sum is σ = 682181683292160. Its totient is φ = 147993406387200.

The previous prime is 323440402204121. The next prime is 323440402204159. The reversal of 323440402204144 is 441402204044323.

It is a super-2 number, since 2×323440402204144² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20474791254 + ... + 20474807050.

It is an arithmetic number, because the mean of its divisors is an integer number (4263635520576).

Almost surely, 2^{323440402204144} 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 323440402204144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341090841646080).

323440402204144 is an abundant number, since it is smaller than the sum of its proper divisors (358741281088016).

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

323440402204144 is a wasteful number, since it uses less digits than its factorization.

323440402204144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19719 (or 19713 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 323440402204144 its reverse (441402204044323), we get a palindrome (764842606248467).

The spelling of 323440402204144 in words is "three hundred twenty-three trillion, four hundred forty billion, four hundred two million, two hundred four thousand, one hundred forty-four".