243630326642 has 4 divisors (see below), whose sum is σ = 365445489966. Its totient is φ = 121815163320.

The previous prime is 243630326633. The next prime is 243630326647. The reversal of 243630326642 is 246623036342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246623036342 = 2 ⋅123311518171.

It can be written as a sum of positive squares in only one way, i.e., 166317968041 + 77312358601 = 407821^2 + 278051^2 .

It is a super-2 number, since 2×243630326642² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243630326642.

It is not an unprimeable number, because it can be changed into a prime (243630326647) 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, 60907581659 + ... + 60907581662.

Almost surely, 2^243630326642 is an apocalyptic number.

243630326642 is a deficient number, since it is larger than the sum of its proper divisors (121815163324).

243630326642 is a wasteful number, since it uses less digits than its factorization.

243630326642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121815163323.

The product of its (nonzero) digits is 746496, while the sum is 41.

The spelling of 243630326642 in words is "two hundred forty-three billion, six hundred thirty million, three hundred twenty-six thousand, six hundred forty-two".