243123454105 has 64 divisors (see below), whose sum is σ = 351462182400. Its totient is φ = 161262565632.

The previous prime is 243123454087. The next prime is 243123454129. The reversal of 243123454105 is 501454321342.

It is not a de Polignac number, because 243123454105 - 2⁷ = 243123453977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10966642 + ... + 10988788.

It is an arithmetic number, because the mean of its divisors is an integer number (5491596600).

Almost surely, 2^243123454105 is an apocalyptic number.

It is an amenable number.

243123454105 is a deficient number, since it is larger than the sum of its proper divisors (108338728295).

243123454105 is a wasteful number, since it uses less digits than its factorization.

243123454105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22383 (or 22369 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 243123454105 its reverse (501454321342), we get a palindrome (744577775447).

The spelling of 243123454105 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred fifty-four thousand, one hundred five".