8243043778 has 16 divisors (see below), whose sum is σ = 12766761216. Its totient is φ = 3987526320.

The previous prime is 8243043773. The next prime is 8243043803. The reversal of 8243043778 is 8773403428.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (8243043773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255925 + ... + 286327.

It is an arithmetic number, because the mean of its divisors is an integer number (797922576).

Almost surely, 2^8243043778 is an apocalyptic number.

8243043778 is a deficient number, since it is larger than the sum of its proper divisors (4523717438).

8243043778 is a wasteful number, since it uses less digits than its factorization.

8243043778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34809.

The product of its (nonzero) digits is 903168, while the sum is 46.

The square root of 8243043778 is about 90791.2098057956. The cubic root of 8243043778 is about 2020.0519362198.

The spelling of 8243043778 in words is "eight billion, two hundred forty-three million, forty-three thousand, seven hundred seventy-eight".