243422757749 has 16 divisors (see below), whose sum is σ = 258441093120. Its totient is φ = 228801933360.

The previous prime is 243422757731. The next prime is 243422757757. The reversal of 243422757749 is 947757224342.

It is a cyclic number.

It is not a de Polignac number, because 243422757749 - 2⁸ = 243422757493 is a prime.

It is a super-4 number, since 4×243422757749⁴ (a number of 47 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243422757694 and 243422757703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243422757709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65924 + ... + 700850.

It is an arithmetic number, because the mean of its divisors is an integer number (16152568320).

Almost surely, 2^243422757749 is an apocalyptic number.

It is an amenable number.

243422757749 is a deficient number, since it is larger than the sum of its proper divisors (15018335371).

243422757749 is a wasteful number, since it uses less digits than its factorization.

243422757749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635240.

The product of its digits is 23708160, while the sum is 56.

The spelling of 243422757749 in words is "two hundred forty-three billion, four hundred twenty-two million, seven hundred fifty-seven thousand, seven hundred forty-nine".