243042555546 has 36 divisors (see below), whose sum is σ = 612566443242. Its totient is φ = 69440729904.

The previous prime is 243042555523. The next prime is 243042555593. The reversal of 243042555546 is 645555240342.

243042555546 is a `hidden beast` number, since 2 + 4 + 3 + 0 + 42 + 55 + 554 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 226063162521 + 16979393025 = 475461^2 + 130305^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 137778345 + ... + 137780108.

Almost surely, 2^243042555546 is an apocalyptic number.

243042555546 is an abundant number, since it is smaller than the sum of its proper divisors (369523887696).

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

243042555546 is a wasteful number, since it uses less digits than its factorization.

243042555546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275558475 (or 275558465 counting only the distinct ones).

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

Adding to 243042555546 its reverse (645555240342), we get a palindrome (888597795888).

The spelling of 243042555546 in words is "two hundred forty-three billion, forty-two million, five hundred fifty-five thousand, five hundred forty-six".