243006722067645 has 36 divisors (see below), whose sum is σ = 440321443003260. Its totient is φ = 123968646607872.

The previous prime is 243006722067623. The next prime is 243006722067751. The reversal of 243006722067645 is 546760227600342.

243006722067645 is a `hidden beast` number, since 2 + 4 + 300 + 6 + 7 + 220 + 6 + 76 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33368437477764 + 209638284589881 = 5776542^2 + 14478891^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243006722067645 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 243006722067591 and 243006722067600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5104087140 + ... + 5104134749.

It is an arithmetic number, because the mean of its divisors is an integer number (12231151194535).

Almost surely, 2^{243006722067645} is an apocalyptic number.

It is an amenable number.

243006722067645 is a deficient number, since it is larger than the sum of its proper divisors (197314720935615).

243006722067645 is a wasteful number, since it uses less digits than its factorization.

243006722067645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208221946 (or 10208221920 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 54.

Adding to 243006722067645 its reverse (546760227600342), we get a palindrome (789766949667987).

The spelling of 243006722067645 in words is "two hundred forty-three trillion, six billion, seven hundred twenty-two million, sixty-seven thousand, six hundred forty-five".