243155055136 has 144 divisors (see below), whose sum is σ = 577832693760. Its totient is φ = 100321320960.

The previous prime is 243155055131. The next prime is 243155055193. The reversal of 243155055136 is 631550551342.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (243155055131) 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 23 ways as a sum of consecutive naturals, for example, 9368385 + ... + 9394303.

It is an arithmetic number, because the mean of its divisors is an integer number (4012727040).

Almost surely, 2^243155055136 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 243155055136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288916346880).

243155055136 is an abundant number, since it is smaller than the sum of its proper divisors (334677638624).

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

243155055136 is a wasteful number, since it uses less digits than its factorization.

243155055136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26167 (or 26152 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 40.

The spelling of 243155055136 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-five thousand, one hundred thirty-six".