242668718539 has 4 divisors (see below), whose sum is σ = 261335543056. Its totient is φ = 224001894024.

The previous prime is 242668718531. The next prime is 242668718557. The reversal of 242668718539 is 935817866242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242668718539 - 2³ = 242668718531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242668718531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9333412239 + ... + 9333412264.

It is an arithmetic number, because the mean of its divisors is an integer number (65333885764).

Almost surely, 2^242668718539 is an apocalyptic number.

242668718539 is a deficient number, since it is larger than the sum of its proper divisors (18666824517).

242668718539 is a wasteful number, since it uses less digits than its factorization.

242668718539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18666824516.

The product of its digits is 34836480, while the sum is 61.

The spelling of 242668718539 in words is "two hundred forty-two billion, six hundred sixty-eight million, seven hundred eighteen thousand, five hundred thirty-nine".