4043843641 has 2 divisors, whose sum is σ = 4043843642. Its totient is φ = 4043843640.

The previous prime is 4043843633. The next prime is 4043843707. The reversal of 4043843641 is 1463483404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143319616 + 1900524025 = 46296^2 + 43595^2 .

It is a cyclic number.

It is not a de Polignac number, because 4043843641 - 2³ = 4043843633 is a prime.

It is a super-2 number, since 2×4043843641² = 32705342785712273762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4043843641.

It is not a weakly prime, because it can be changed into another prime (4043843611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021921820 + 2021921821.

It is an arithmetic number, because the mean of its divisors is an integer number (2021921821).

Almost surely, 2^4043843641 is an apocalyptic number.

It is an amenable number.

4043843641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4043843641 is an equidigital number, since it uses as much as digits as its factorization.

4043843641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 37.

The square root of 4043843641 is about 63591.2229871387. Note that the first 3 decimals coincide. The cubic root of 4043843641 is about 1593.1797765752.

The spelling of 4043843641 in words is "four billion, forty-three million, eight hundred forty-three thousand, six hundred forty-one".