243403303664 has 20 divisors (see below), whose sum is σ = 499334719104. Its totient is φ = 114542731008.

The previous prime is 243403303603. The next prime is 243403303691. The reversal of 243403303664 is 466303304342.

It is a congruent number.

It is an unprimeable number.

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, 447432272 + ... + 447432815.

Almost surely, 2^243403303664 is an apocalyptic number.

It is an amenable number.

243403303664 is an abundant number, since it is smaller than the sum of its proper divisors (255931415440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243403303664 is a wasteful number, since it uses less digits than its factorization.

243403303664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894865112 (or 894865106 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 38.

The spelling of 243403303664 in words is "two hundred forty-three billion, four hundred three million, three hundred three thousand, six hundred sixty-four".