4643966191 has 12 divisors (see below), whose sum is σ = 4802974176. Its totient is φ = 4490069760.

The previous prime is 4643966189. The next prime is 4643966203. The reversal of 4643966191 is 1916693464.

It is a happy number.

It is not a de Polignac number, because 4643966191 - 2¹ = 4643966189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4643966101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2029450 + ... + 2031736.

It is an arithmetic number, because the mean of its divisors is an integer number (400247848).

Almost surely, 2^4643966191 is an apocalyptic number.

4643966191 is a deficient number, since it is larger than the sum of its proper divisors (159007985).

4643966191 is a wasteful number, since it uses less digits than its factorization.

4643966191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462 (or 4431 counting only the distinct ones).

The product of its digits is 839808, while the sum is 49.

The square root of 4643966191 is about 68146.6520894460. The cubic root of 4643966191 is about 1668.3852812403.

The spelling of 4643966191 in words is "four billion, six hundred forty-three million, nine hundred sixty-six thousand, one hundred ninety-one".