243651454643 has 4 divisors (see below), whose sum is σ = 243667196688. Its totient is φ = 243635712600.

The previous prime is 243651454639. The next prime is 243651454679. The reversal of 243651454643 is 346454156342.

243651454643 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 is a cyclic number.

It is not a de Polignac number, because 243651454643 - 2² = 243651454639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243651454843) by changing a digit.

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, 7847783 + ... + 7878768.

It is an arithmetic number, because the mean of its divisors is an integer number (60916799172).

Almost surely, 2^243651454643 is an apocalyptic number.

243651454643 is a deficient number, since it is larger than the sum of its proper divisors (15742045).

243651454643 is a wasteful number, since it uses less digits than its factorization.

243651454643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15742044.

The product of its digits is 4147200, while the sum is 47.

The spelling of 243651454643 in words is "two hundred forty-three billion, six hundred fifty-one million, four hundred fifty-four thousand, six hundred forty-three".