243933496505 has 4 divisors (see below), whose sum is σ = 292720195812. Its totient is φ = 195146797200.

The previous prime is 243933496483. The next prime is 243933496523. The reversal of 243933496505 is 505694339342.

243933496505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 142690529536 + 101242966969 = 377744^2 + 318187^2 .

It is not a de Polignac number, because 243933496505 - 2¹² = 243933492409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24393349646 + ... + 24393349655.

It is an arithmetic number, because the mean of its divisors is an integer number (73180048953).

Almost surely, 2^243933496505 is an apocalyptic number.

It is an amenable number.

243933496505 is a deficient number, since it is larger than the sum of its proper divisors (48786699307).

243933496505 is an equidigital number, since it uses as much as digits as its factorization.

243933496505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48786699306.

The product of its (nonzero) digits is 10497600, while the sum is 53.

The spelling of 243933496505 in words is "two hundred forty-three billion, nine hundred thirty-three million, four hundred ninety-six thousand, five hundred five".