243325544440 has 128 divisors (see below), whose sum is σ = 632655360000. Its totient is φ = 83241748480.

The previous prime is 243325544417. The next prime is 243325544447. The reversal of 243325544440 is 44445523342.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 243325544393 and 243325544402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243325544447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22427097 + ... + 22437943.

It is an arithmetic number, because the mean of its divisors is an integer number (4942620000).

Almost surely, 2^243325544440 is an apocalyptic number.

243325544440 is a gapful number since it is divisible by the number (20) 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 243325544440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316327680000).

243325544440 is an abundant number, since it is smaller than the sum of its proper divisors (389329815560).

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

243325544440 is a wasteful number, since it uses less digits than its factorization.

243325544440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13885 (or 13881 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 40.

The spelling of 243325544440 in words is "two hundred forty-three billion, three hundred twenty-five million, five hundred forty-four thousand, four hundred forty".