243254243440440 has 64 divisors (see below), whose sum is σ = 810847478138400. Its totient is φ = 64867798250496.

The previous prime is 243254243440379. The next prime is 243254243440457. The reversal of 243254243440440 is 44044342452342.

It is a happy number.

243254243440440 is a `hidden beast` number, since 2 + 4 + 32 + 542 + 4 + 34 + 4 + 0 + 4 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112617704217 + ... + 112617706376.

Almost surely, 2^{243254243440440} is an apocalyptic number.

243254243440440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243254243440440 is an abundant number, since it is smaller than the sum of its proper divisors (567593234697960).

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

243254243440440 is a wasteful number, since it uses less digits than its factorization.

243254243440440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225235410613 (or 225235410603 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 45.

Adding to 243254243440440 its reverse (44044342452342), we get a palindrome (287298585892782).

The spelling of 243254243440440 in words is "two hundred forty-three trillion, two hundred fifty-four billion, two hundred forty-three million, four hundred forty thousand, four hundred forty".