243665585566342 has 16 divisors (see below), whose sum is σ = 374467511328192. Its totient is φ = 118859645286720.

The previous prime is 243665585566331. The next prime is 243665585566343.

243665585566342 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243665585566343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4140844509 + ... + 4140903352.

It is an arithmetic number, because the mean of its divisors is an integer number (23404219458012).

Almost surely, 2^{243665585566342} is an apocalyptic number.

243665585566342 is a deficient number, since it is larger than the sum of its proper divisors (130801925761850).

243665585566342 is a wasteful number, since it uses less digits than its factorization.

243665585566342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8281748223.

The product of its digits is 3732480000, while the sum is 70.

The spelling of 243665585566342 in words is "two hundred forty-three trillion, six hundred sixty-five billion, five hundred eighty-five million, five hundred sixty-six thousand, three hundred forty-two".