4543643943 has 32 divisors (see below), whose sum is σ = 6866596800. Its totient is φ = 2968363008.

The previous prime is 4543643911. The next prime is 4543643971. The reversal of 4543643943 is 3493463454.

4543643943 is a `hidden beast` number, since 4 + 543 + 64 + 3 + 9 + 43 = 666.

It is not a de Polignac number, because 4543643943 - 2⁵ = 4543643911 is a prime.

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

Its product of digits (1866240) is a multiple of the sum of its prime factors (3888).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4543633943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1740223 + ... + 1742831.

It is an arithmetic number, because the mean of its divisors is an integer number (214581150).

Almost surely, 2^4543643943 is an apocalyptic number.

4543643943 is a deficient number, since it is larger than the sum of its proper divisors (2322952857).

4543643943 is a wasteful number, since it uses less digits than its factorization.

4543643943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888 (or 3882 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

The square root of 4543643943 is about 67406.5571216925. The cubic root of 4543643943 is about 1656.2838366924.

The spelling of 4543643943 in words is "four billion, five hundred forty-three million, six hundred forty-three thousand, nine hundred forty-three".