242621543266 has 4 divisors (see below), whose sum is σ = 363932314902. Its totient is φ = 121310771632.

The previous prime is 242621543261. The next prime is 242621543267. The reversal of 242621543266 is 662345126242.

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

It can be written as a sum of positive squares in only one way, i.e., 193090815241 + 49530728025 = 439421^2 + 222555^2 .

It is not an unprimeable number, because it can be changed into a prime (242621543261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655385815 + ... + 60655385818.

Almost surely, 2^242621543266 is an apocalyptic number.

242621543266 is a deficient number, since it is larger than the sum of its proper divisors (121310771636).

242621543266 is a wasteful number, since it uses less digits than its factorization.

242621543266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121310771635.

The product of its digits is 829440, while the sum is 43.

The spelling of 242621543266 in words is "two hundred forty-two billion, six hundred twenty-one million, five hundred forty-three thousand, two hundred sixty-six".