243437391912 has 192 divisors, whose sum is σ = 727029072000. Its totient is φ = 67468515840.

The previous prime is 243437391893. The next prime is 243437391943. The reversal of 243437391912 is 219193734342.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4085389 + ... + 4144547.

It is an arithmetic number, because the mean of its divisors is an integer number (3786609750).

Almost surely, 2^243437391912 is an apocalyptic number.

243437391912 is a gapful number since it is divisible by the number (22) 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 243437391912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363514536000).

243437391912 is an abundant number, since it is smaller than the sum of its proper divisors (483591680088).

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

243437391912 is a wasteful number, since it uses less digits than its factorization.

243437391912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59312 (or 59297 counting only the distinct ones).

The product of its digits is 979776, while the sum is 48.

The spelling of 243437391912 in words is "two hundred forty-three billion, four hundred thirty-seven million, three hundred ninety-one thousand, nine hundred twelve".