243366013509 has 16 divisors (see below), whose sum is σ = 324926469120. Its totient is φ = 162024937200.

The previous prime is 243366013439. The next prime is 243366013523. The reversal of 243366013509 is 905310663342.

It is a happy number.

It is not a de Polignac number, because 243366013509 - 2¹² = 243366009413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243366013109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6855684 + ... + 6891090.

It is an arithmetic number, because the mean of its divisors is an integer number (20307904320).

Almost surely, 2^243366013509 is an apocalyptic number.

It is an amenable number.

243366013509 is a deficient number, since it is larger than the sum of its proper divisors (81560455611).

243366013509 is a wasteful number, since it uses less digits than its factorization.

243366013509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38440.

The product of its (nonzero) digits is 349920, while the sum is 42.

The spelling of 243366013509 in words is "two hundred forty-three billion, three hundred sixty-six million, thirteen thousand, five hundred nine".