243723565340 has 24 divisors (see below), whose sum is σ = 512011795680. Its totient is φ = 97452795968.

The previous prime is 243723565303. The next prime is 243723565363. The reversal of 243723565340 is 43565327342.

It is a junction number, because it is equal to n+sod(n) for n = 243723565291 and 243723565300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2234795 + ... + 2341314.

It is an arithmetic number, because the mean of its divisors is an integer number (21333824820).

Almost surely, 2^243723565340 is an apocalyptic number.

243723565340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243723565340 is an abundant number, since it is smaller than the sum of its proper divisors (268288230340).

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

243723565340 is a wasteful number, since it uses less digits than its factorization.

243723565340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4578781 (or 4578779 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 44.

The spelling of 243723565340 in words is "two hundred forty-three billion, seven hundred twenty-three million, five hundred sixty-five thousand, three hundred forty".