243593745815 has 12 divisors (see below), whose sum is σ = 340036984296. Its totient is φ = 167035711248.

The previous prime is 243593745799. The next prime is 243593745817. The reversal of 243593745815 is 518547395342.

It is not a de Polignac number, because 243593745815 - 2⁴ = 243593745799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243593745817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 497129849 + ... + 497130338.

It is an arithmetic number, because the mean of its divisors is an integer number (28336415358).

Almost surely, 2^243593745815 is an apocalyptic number.

243593745815 is a deficient number, since it is larger than the sum of its proper divisors (96443238481).

243593745815 is an equidigital number, since it uses as much as digits as its factorization.

243593745815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994260206 (or 994260199 counting only the distinct ones).

The product of its digits is 18144000, while the sum is 56.

The spelling of 243593745815 in words is "two hundred forty-three billion, five hundred ninety-three million, seven hundred forty-five thousand, eight hundred fifteen".