243004340663 has 4 divisors (see below), whose sum is σ = 277719246480. Its totient is φ = 208289434848.

The previous prime is 243004340659. The next prime is 243004340707. The reversal of 243004340663 is 366043400342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243004340663 - 2² = 243004340659 is a prime.

It is a super-2 number, since 2×243004340663² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243004340263) 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 in 3 ways as a sum of consecutive naturals, for example, 17357452898 + ... + 17357452911.

It is an arithmetic number, because the mean of its divisors is an integer number (69429811620).

Almost surely, 2^243004340663 is an apocalyptic number.

243004340663 is a deficient number, since it is larger than the sum of its proper divisors (34714905817).

243004340663 is an equidigital number, since it uses as much as digits as its factorization.

243004340663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34714905816.

The product of its (nonzero) digits is 124416, while the sum is 35.

The spelling of 243004340663 in words is "two hundred forty-three billion, four million, three hundred forty thousand, six hundred sixty-three".