243155455443 has 20 divisors (see below), whose sum is σ = 365883570360. Its totient is φ = 160920391392.

The previous prime is 243155455421. The next prime is 243155455451. The reversal of 243155455443 is 344554551342.

243155455443 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 5 + 54 + 554 + 43 = 666.

It is not a de Polignac number, because 243155455443 - 2³⁰ = 242081713619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243155455043) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10944813 + ... + 10967006.

It is an arithmetic number, because the mean of its divisors is an integer number (18294178518).

Almost surely, 2^243155455443 is an apocalyptic number.

243155455443 is a deficient number, since it is larger than the sum of its proper divisors (122728114917).

243155455443 is a wasteful number, since it uses less digits than its factorization.

243155455443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21911968 (or 21911959 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 45.

The spelling of 243155455443 in words is "two hundred forty-three billion, one hundred fifty-five million, four hundred fifty-five thousand, four hundred forty-three".