243421189632 has 200 divisors, whose sum is σ = 758140176816. Its totient is φ = 77612249088.

The previous prime is 243421189603. The next prime is 243421189639. The reversal of 243421189632 is 236981124342.

243421189632 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 2 + 1 + 1 + 8 + 9 + 632 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243421189639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 826258 + ... + 1081454.

Almost surely, 2^243421189632 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 243421189632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379070088408).

243421189632 is an abundant number, since it is smaller than the sum of its proper divisors (514718987184).

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

243421189632 is an equidigital number, since it uses as much as digits as its factorization.

243421189632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255250 (or 255225 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 243421189632 in words is "two hundred forty-three billion, four hundred twenty-one million, one hundred eighty-nine thousand, six hundred thirty-two".