243120544245 has 96 divisors (see below), whose sum is σ = 451825452000. Its totient is φ = 120507482112.

The previous prime is 243120544243. The next prime is 243120544253. The reversal of 243120544245 is 542445021342.

243120544245 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 205 + 442 + 4 + 5 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 93161079729 + 149959464516 = 305223^2 + 387246^2 .

It is not a de Polignac number, because 243120544245 - 2¹ = 243120544243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120544241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19713241 + ... + 19725569.

It is an arithmetic number, because the mean of its divisors is an integer number (4706515125).

Almost surely, 2^243120544245 is an apocalyptic number.

It is an amenable number.

243120544245 is a deficient number, since it is larger than the sum of its proper divisors (208704907755).

243120544245 is a wasteful number, since it uses less digits than its factorization.

243120544245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12679 (or 12676 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 243120544245 its reverse (542445021342), we get a palindrome (785565565587).

The spelling of 243120544245 in words is "two hundred forty-three billion, one hundred twenty million, five hundred forty-four thousand, two hundred forty-five".