243206145504 has 144 divisors (see below), whose sum is σ = 791096997600. Its totient is φ = 69427952640.

The previous prime is 243206145473. The next prime is 243206145563. The reversal of 243206145504 is 405541602342.

243206145504 is a `hidden beast` number, since 2 + 4 + 3 + 2 + 0 + 6 + 145 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2329822 + ... + 2431970.

It is an arithmetic number, because the mean of its divisors is an integer number (5493729150).

Almost surely, 2^243206145504 is an apocalyptic number.

243206145504 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 243206145504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (395548498800).

243206145504 is an abundant number, since it is smaller than the sum of its proper divisors (547890852096).

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

243206145504 is a wasteful number, since it uses less digits than its factorization.

243206145504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103353 (or 103342 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 243206145504 its reverse (405541602342), we get a palindrome (648747747846).

The spelling of 243206145504 in words is "two hundred forty-three billion, two hundred six million, one hundred forty-five thousand, five hundred four".