243120141440 has 128 divisors (see below), whose sum is σ = 646010406720. Its totient is φ = 86739128320.

The previous prime is 243120141431. The next prime is 243120141557. The reversal of 243120141440 is 44141021342.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47327 + ... + 698913.

Almost surely, 2^243120141440 is an apocalyptic number.

243120141440 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 243120141440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323005203360).

243120141440 is an abundant number, since it is smaller than the sum of its proper divisors (402890265280).

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

243120141440 is a wasteful number, since it uses less digits than its factorization.

243120141440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651670 (or 651658 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 243120141440 its reverse (44141021342), we get a palindrome (287261162782).

The spelling of 243120141440 in words is "two hundred forty-three billion, one hundred twenty million, one hundred forty-one thousand, four hundred forty".