243906496864 has 24 divisors (see below), whose sum is σ = 508437441288. Its totient is φ = 114779527680.

The previous prime is 243906496849. The next prime is 243906496891. The reversal of 243906496864 is 468694609342.

243906496864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 224178222 + ... + 224179309.

It is an arithmetic number, because the mean of its divisors is an integer number (21184893387).

Almost surely, 2^243906496864 is an apocalyptic number.

It is an amenable number.

243906496864 is an abundant number, since it is smaller than the sum of its proper divisors (264530944424).

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

243906496864 is a wasteful number, since it uses less digits than its factorization.

243906496864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448357558 (or 448357550 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 61.

The spelling of 243906496864 in words is "two hundred forty-three billion, nine hundred six million, four hundred ninety-six thousand, eight hundred sixty-four".