243968601600 has 720 divisors, whose sum is σ = 913258288800. Its totient is φ = 62117314560.

The previous prime is 243968601563. The next prime is 243968601619. The reversal of 243968601600 is 6106869342.

243968601600 is a `hidden beast` number, since 2 + 4 + 39 + 6 + 8 + 6 + 0 + 1 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 344102046 + ... + 344102754.

It is an arithmetic number, because the mean of its divisors is an integer number (1268414290).

Almost surely, 2^243968601600 is an apocalyptic number.

243968601600 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 243968601600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (456629144400).

243968601600 is an abundant number, since it is smaller than the sum of its proper divisors (669289687200).

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

243968601600 is a wasteful number, since it uses less digits than its factorization.

243968601600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 243968601600 in words is "two hundred forty-three billion, nine hundred sixty-eight million, six hundred one thousand, six hundred".