243557411328 has 1280 divisors, whose sum is σ = 950841999360. Its totient is φ = 60217344000.

The previous prime is 243557411327. The next prime is 243557411381. The reversal of 243557411328 is 823114755342.

243557411328 is a `hidden beast` number, since 2 + 4 + 35 + 574 + 11 + 32 + 8 = 666.

It is a super-2 number, since 2×243557411328² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243557411327) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3992744418 + ... + 3992744478.

It is an arithmetic number, because the mean of its divisors is an integer number (742845312).

Almost surely, 2^243557411328 is an apocalyptic number.

243557411328 is a gapful number since it is divisible by the number (28) 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 243557411328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (475420999680).

243557411328 is an abundant number, since it is smaller than the sum of its proper divisors (707284588032).

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

243557411328 is an equidigital number, since it uses as much as digits as its factorization.

243557411328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 115 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The spelling of 243557411328 in words is "two hundred forty-three billion, five hundred fifty-seven million, four hundred eleven thousand, three hundred twenty-eight".