243977222016 has 256 divisors, whose sum is σ = 786983040000. Its totient is φ = 73796014080.

The previous prime is 243977221997. The next prime is 243977222059. The reversal of 243977222016 is 610222779342.

243977222016 is a `hidden beast` number, since 2 + 439 + 7 + 7 + 2 + 2 + 201 + 6 = 666.

243977222016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 21625465 + ... + 21636743.

It is an arithmetic number, because the mean of its divisors is an integer number (3074152500).

Almost surely, 2^243977222016 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 243977222016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393491520000).

243977222016 is an abundant number, since it is smaller than the sum of its proper divisors (543005817984).

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

243977222016 is a wasteful number, since it uses less digits than its factorization.

243977222016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11882 (or 11864 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 243977222016 in words is "two hundred forty-three billion, nine hundred seventy-seven million, two hundred twenty-two thousand, sixteen".