4243918905 has 12 divisors (see below), whose sum is σ = 7356126180. Its totient is φ = 2263423392.

The previous prime is 4243918843. The next prime is 4243918963. The reversal of 4243918905 is 5098193424.

It can be written as a sum of positive squares in 2 ways, for example, as 1766268729 + 2477650176 = 42027^2 + 49776^2 .

It is not a de Polignac number, because 4243918905 - 2¹¹ = 4243916857 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 94309309 = 4243918905 / (4 + 2 + 4 + 3 + 9 + 1 + 8 + 9 + 0 + 5).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47154610 + ... + 47154699.

It is an arithmetic number, because the mean of its divisors is an integer number (613010515).

Almost surely, 2^4243918905 is an apocalyptic number.

4243918905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4243918905 is a deficient number, since it is larger than the sum of its proper divisors (3112207275).

4243918905 is a wasteful number, since it uses less digits than its factorization.

4243918905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94309320 (or 94309317 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 4243918905 is about 65145.3674868751. The cubic root of 4243918905 is about 1619.0329676711.

The spelling of 4243918905 in words is "four billion, two hundred forty-three million, nine hundred eighteen thousand, nine hundred five".