4185640943 has 4 divisors (see below), whose sum is σ = 4566153768. Its totient is φ = 3805128120.

The previous prime is 4185640939. The next prime is 4185640961. The reversal of 4185640943 is 3490465814.

4185640943 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4185640943 - 2² = 4185640939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4185640894 and 4185640903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4185640903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190256396 + ... + 190256417.

It is an arithmetic number, because the mean of its divisors is an integer number (1141538442).

Almost surely, 2^4185640943 is an apocalyptic number.

4185640943 is a deficient number, since it is larger than the sum of its proper divisors (380512825).

4185640943 is a wasteful number, since it uses less digits than its factorization.

4185640943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380512824.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 4185640943 is about 64696.5296055360. The cubic root of 4185640943 is about 1611.5878709608.

The spelling of 4185640943 in words is "four billion, one hundred eighty-five million, six hundred forty thousand, nine hundred forty-three".