243338194944 has 468 divisors, whose sum is σ = 769322637720. Its totient is φ = 74070097920.

The previous prime is 243338194909. The next prime is 243338194949. The reversal of 243338194944 is 449491833342.

243338194944 is a `hidden beast` number, since 2 + 43 + 33 + 81 + 9 + 494 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (468).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (243338194949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 865972084 + ... + 865972364.

It is an arithmetic number, because the mean of its divisors is an integer number (1643851790).

Almost surely, 2^243338194944 is an apocalyptic number.

243338194944 is a gapful number since it is divisible by the number (24) 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 243338194944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384661318860).

243338194944 is an abundant number, since it is smaller than the sum of its proper divisors (525984442776).

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

243338194944 is a wasteful number, since it uses less digits than its factorization.

243338194944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476 (or 438 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 54.

The spelling of 243338194944 in words is "two hundred forty-three billion, three hundred thirty-eight million, one hundred ninety-four thousand, nine hundred forty-four".