243117955080 has 1152 divisors, whose sum is σ = 1115014118400. Its totient is φ = 45113241600.

The previous prime is 243117955039. The next prime is 243117955081. The reversal of 243117955080 is 80559711342.

243117955080 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 17 + 9 + 550 + 80 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (243117955081) by changing a digit.

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 287 ways as a sum of consecutive naturals, for example, 78196566 + ... + 78199674.

It is an arithmetic number, because the mean of its divisors is an integer number (967894200).

Almost surely, 2^243117955080 is an apocalyptic number.

243117955080 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 243117955080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557507059200).

243117955080 is an abundant number, since it is smaller than the sum of its proper divisors (871896163320).

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

243117955080 is a wasteful number, since it uses less digits than its factorization.

243117955080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195 (or 3181 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 243117955080 in words is "two hundred forty-three billion, one hundred seventeen million, nine hundred fifty-five thousand, eighty".