243548390845369 has 9 divisors (see below), whose sum is σ = 244833185821861. Its totient is φ = 242270303233180.

The previous prime is 243548390845367. The next prime is 243548390845373. The reversal of 243548390845369 is 963548093845342.

The square root of 243548390845369 is 15606037.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 243548390845369 - 2¹ = 243548390845367 is a prime.

It is a super-3 number, since 3×243548390845369³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243548390845367) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2980712214 + ... + 2980793920.

Almost surely, 2^{243548390845369} is an apocalyptic number.

243548390845369 is the 15606037-th square number.

243548390845369 is the 7803019-th centered octagonal number.

It is an amenable number.

243548390845369 is a deficient number, since it is larger than the sum of its proper divisors (1284794976492).

243548390845369 is an frugal number, since it uses more digits than its factorization.

243548390845369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163796 (or 81898 counting only the distinct ones).

The product of its (nonzero) digits is 2687385600, while the sum is 73.

The spelling of 243548390845369 in words is "two hundred forty-three trillion, five hundred forty-eight billion, three hundred ninety million, eight hundred forty-five thousand, three hundred sixty-nine".