243943412544 has 672 divisors, whose sum is σ = 835033006080. Its totient is φ = 67366785024.

The previous prime is 243943412533. The next prime is 243943412593. The reversal of 243943412544 is 445214349342.

243943412544 is a `hidden beast` number, since 2 + 4 + 3 + 94 + 3 + 4 + 12 + 544 = 666.

243943412544 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243943412544² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243943412544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 415576219 + ... + 415576805.

It is an arithmetic number, because the mean of its divisors is an integer number (1242608640).

Almost surely, 2^243943412544 is an apocalyptic number.

243943412544 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 243943412544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417516503040).

243943412544 is an abundant number, since it is smaller than the sum of its proper divisors (591089593536).

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

243943412544 is a wasteful number, since it uses less digits than its factorization.

243943412544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 774 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 45.

The spelling of 243943412544 in words is "two hundred forty-three billion, nine hundred forty-three million, four hundred twelve thousand, five hundred forty-four".