6191855 has 4 divisors (see below), whose sum is σ = 7430232. Its totient is φ = 4953480.

The previous prime is 6191849. The next prime is 6191897. The reversal of 6191855 is 5581916.

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

It is a de Polignac number, because none of the positive numbers 2^k-6191855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619181 + ... + 619190.

It is an arithmetic number, because the mean of its divisors is an integer number (1857558).

Almost surely, 2^6191855 is an apocalyptic number.

6191855 is a deficient number, since it is larger than the sum of its proper divisors (1238377).

6191855 is a wasteful number, since it uses less digits than its factorization.

6191855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238376.

The product of its digits is 10800, while the sum is 35.

The square root of 6191855 is about 2488.3438267249. The cubic root of 6191855 is about 183.6285729600.

The spelling of 6191855 in words is "six million, one hundred ninety-one thousand, eight hundred fifty-five".