243397656000 has 896 divisors, whose sum is σ = 924348672000. Its totient is φ = 62673408000.

The previous prime is 243397655867. The next prime is 243397656037. The reversal of 243397656000 is 656793342.

243397656000 is a `hidden beast` number, since 2 + 4 + 3 + 39 + 7 + 6 + 5 + 600 + 0 = 666.

243397656000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 904823866 + ... + 904824134.

Almost surely, 2^243397656000 is an apocalyptic number.

243397656000 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 243397656000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462174336000).

243397656000 is an abundant number, since it is smaller than the sum of its proper divisors (680951016000).

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

243397656000 is a wasteful number, since it uses less digits than its factorization.

243397656000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 243397656000 in words is "two hundred forty-three billion, three hundred ninety-seven million, six hundred fifty-six thousand".