243405332144 has 80 divisors (see below), whose sum is σ = 534647155392. Its totient is φ = 106505355264.

The previous prime is 243405332123. The next prime is 243405332231. The reversal of 243405332144 is 441233504342.

It is a super-2 number, since 2×243405332144² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315464 + ... + 765720.

Almost surely, 2^243405332144 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 243405332144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267323577696).

243405332144 is an abundant number, since it is smaller than the sum of its proper divisors (291241823248).

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

243405332144 is a wasteful number, since it uses less digits than its factorization.

243405332144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450414 (or 450408 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 243405332144 its reverse (441233504342), we get a palindrome (684638836486).

The spelling of 243405332144 in words is "two hundred forty-three billion, four hundred five million, three hundred thirty-two thousand, one hundred forty-four".