242180534609 has 4 divisors (see below), whose sum is σ = 260809806516. Its totient is φ = 223551262704.

The previous prime is 242180534599. The next prime is 242180534611. The reversal of 242180534609 is 906435081242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906435081242 = 2 ⋅453217540621.

It can be written as a sum of positive squares in 2 ways, for example, as 11543353600 + 230637181009 = 107440^2 + 480247^2 .

It is a cyclic number.

It is not a de Polignac number, because 242180534609 - 2²⁴ = 242163757393 is a prime.

It is a super-2 number, since 2×242180534609² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242180534609.

It is not an unprimeable number, because it can be changed into a prime (242180539609) 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, 9314635934 + ... + 9314635959.

It is an arithmetic number, because the mean of its divisors is an integer number (65202451629).

Almost surely, 2^242180534609 is an apocalyptic number.

It is an amenable number.

242180534609 is a deficient number, since it is larger than the sum of its proper divisors (18629271907).

242180534609 is a wasteful number, since it uses less digits than its factorization.

242180534609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18629271906.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 242180534609 in words is "two hundred forty-two billion, one hundred eighty million, five hundred thirty-four thousand, six hundred nine".