243204645403 has 4 divisors (see below), whose sum is σ = 243217383768. Its totient is φ = 243191907040.

The previous prime is 243204645401. The next prime is 243204645451. The reversal of 243204645403 is 304546402342.

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 243204645403 - 2¹ = 243204645401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243204645401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6340501 + ... + 6378742.

It is an arithmetic number, because the mean of its divisors is an integer number (60804345942).

Almost surely, 2^243204645403 is an apocalyptic number.

243204645403 is a deficient number, since it is larger than the sum of its proper divisors (12738365).

243204645403 is a wasteful number, since it uses less digits than its factorization.

243204645403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12738364.

The product of its (nonzero) digits is 276480, while the sum is 37.

The spelling of 243204645403 in words is "two hundred forty-three billion, two hundred four million, six hundred forty-five thousand, four hundred three".