243768325441 has 3 divisors (see below), whose sum is σ = 243768819171. Its totient is φ = 243767831712.

The previous prime is 243768325387. The next prime is 243768325457. The reversal of 243768325441 is 144523867342.

The square root of 243768325441 is 493729.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 185822207041 + 57946118400 = 431071^2 + 240720^2 .

It is not a de Polignac number, because 243768325441 - 2¹⁹ = 243767801153 is a prime.

It is a super-3 number, since 3×243768325441³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243768925441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 246865 + ... + 740593.

It is an arithmetic number, because the mean of its divisors is an integer number (81256273057).

Almost surely, 2^243768325441 is an apocalyptic number.

243768325441 is the 493729-th square number.

243768325441 is the 246865-th centered octagonal number.

It is an amenable number.

243768325441 is a deficient number, since it is larger than the sum of its proper divisors (493730).

243768325441 is an frugal number, since it uses more digits than its factorization.

243768325441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987458 (or 493729 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 49.

Multiplying 243768325441 by its sum of digits (49), we get a square (11944647946609 = 3456103²).

The spelling of 243768325441 in words is "two hundred forty-three billion, seven hundred sixty-eight million, three hundred twenty-five thousand, four hundred forty-one".