243723563445 has 64 divisors (see below), whose sum is σ = 403597728000. Its totient is φ = 125535860736.

The previous prime is 243723563429. The next prime is 243723563539. The reversal of 243723563445 is 544365327342.

It is not a de Polignac number, because 243723563445 - 2⁴ = 243723563429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243723563394 and 243723563403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12356251 + ... + 12375959.

It is an arithmetic number, because the mean of its divisors is an integer number (6306214500).

Almost surely, 2^243723563445 is an apocalyptic number.

It is an amenable number.

243723563445 is a deficient number, since it is larger than the sum of its proper divisors (159874164555).

243723563445 is a wasteful number, since it uses less digits than its factorization.

243723563445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20022.

The product of its digits is 7257600, while the sum is 48.

The spelling of 243723563445 in words is "two hundred forty-three billion, seven hundred twenty-three million, five hundred sixty-three thousand, four hundred forty-five".