242766521716538 has 24 divisors (see below), whose sum is σ = 391575687444468. Its totient is φ = 112824957443328.

The previous prime is 242766521716529. The next prime is 242766521716577. The reversal of 242766521716538 is 835617125667242.

It can be written as a sum of positive squares in 2 ways, for example, as 210640898521729 + 32125623194809 = 14513473^2 + 5667947^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3172053431 + ... + 3172129962.

Almost surely, 2^{242766521716538} is an apocalyptic number.

242766521716538 is a deficient number, since it is larger than the sum of its proper divisors (148809165727930).

242766521716538 is a wasteful number, since it uses less digits than its factorization.

242766521716538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6344183486 (or 6344183467 counting only the distinct ones).

The product of its digits is 203212800, while the sum is 65.

The spelling of 242766521716538 in words is "two hundred forty-two trillion, seven hundred sixty-six billion, five hundred twenty-one million, seven hundred sixteen thousand, five hundred thirty-eight".