6191642209 has 4 divisors (see below), whose sum is σ = 6197022720. Its totient is φ = 6186261700.

The previous prime is 6191642167. The next prime is 6191642227. The reversal of 6191642209 is 9022461916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6191642209 - 2⁹ = 6191641697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6191642609) 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, 2688529 + ... + 2690830.

It is an arithmetic number, because the mean of its divisors is an integer number (1549255680).

Almost surely, 2^6191642209 is an apocalyptic number.

It is an amenable number.

6191642209 is a deficient number, since it is larger than the sum of its proper divisors (5380511).

6191642209 is a wasteful number, since it uses less digits than its factorization.

6191642209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380510.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 6191642209 is about 78686.9888164492. The cubic root of 6191642209 is about 1836.2646939246.

The spelling of 6191642209 in words is "six billion, one hundred ninety-one million, six hundred forty-two thousand, two hundred nine".