243393957120 has 144 divisors (see below), whose sum is σ = 777537698112. Its totient is φ = 64888504320.

The previous prime is 243393957119. The next prime is 243393957127. The reversal of 243393957120 is 21759393342.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 243393957120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243393957127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25688704 + ... + 25698176.

It is an arithmetic number, because the mean of its divisors is an integer number (5399567348).

Almost surely, 2^243393957120 is an apocalyptic number.

243393957120 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 243393957120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388768849056).

243393957120 is an abundant number, since it is smaller than the sum of its proper divisors (534143740992).

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

243393957120 is an equidigital number, since it uses as much as digits as its factorization.

243393957120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16188 (or 16174 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 48.

The spelling of 243393957120 in words is "two hundred forty-three billion, three hundred ninety-three million, nine hundred fifty-seven thousand, one hundred twenty".