243545668 has 6 divisors (see below), whose sum is σ = 426204926. Its totient is φ = 121772832.

The previous prime is 243545657. The next prime is 243545669. The reversal of 243545668 is 866545342.

It can be written as a sum of positive squares in only one way, i.e., 197739844 + 45805824 = 14062^2 + 6768^2 .

It is a super-3 number, since 3×243545668³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (243545669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30443205 + ... + 30443212.

Almost surely, 2^243545668 is an apocalyptic number.

It is an amenable number.

243545668 is a deficient number, since it is larger than the sum of its proper divisors (182659258).

243545668 is a wasteful number, since it uses less digits than its factorization.

243545668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60886421 (or 60886419 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The square root of 243545668 is about 15605.9497628308. The cubic root of 243545668 is about 624.4918903913.

The spelling of 243545668 in words is "two hundred forty-three million, five hundred forty-five thousand, six hundred sixty-eight".