242643163665 has 64 divisors (see below), whose sum is σ = 446588093952. Its totient is φ = 110199398400.

The previous prime is 242643163657. The next prime is 242643163667. The reversal of 242643163665 is 566361346242.

242643163665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242643163665 - 2³ = 242643163657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242643163667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20766625 + ... + 20778305.

It is an arithmetic number, because the mean of its divisors is an integer number (6977938968).

Almost surely, 2^242643163665 is an apocalyptic number.

It is an amenable number.

242643163665 is a deficient number, since it is larger than the sum of its proper divisors (203944930287).

242643163665 is a wasteful number, since it uses less digits than its factorization.

242643163665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12970.

The product of its digits is 3732480, while the sum is 48.

The spelling of 242643163665 in words is "two hundred forty-two billion, six hundred forty-three million, one hundred sixty-three thousand, six hundred sixty-five".