243123498438 has 64 divisors (see below), whose sum is σ = 528519014400. Its totient is φ = 74275418880.

The previous prime is 243123498433. The next prime is 243123498461. The reversal of 243123498438 is 834894321342.

It is a happy number.

243123498438 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 not an unprimeable number, because it can be changed into a prime (243123498433) by changing a digit.

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, 13310520 + ... + 13328772.

It is an arithmetic number, because the mean of its divisors is an integer number (8258109600).

Almost surely, 2^243123498438 is an apocalyptic number.

243123498438 is an abundant number, since it is smaller than the sum of its proper divisors (285395515962).

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

243123498438 is a wasteful number, since it uses less digits than its factorization.

243123498438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22077.

The product of its digits is 3981312, while the sum is 51.

The spelling of 243123498438 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred ninety-eight thousand, four hundred thirty-eight".