6428186646 has 32 divisors (see below), whose sum is σ = 14710844160. Its totient is φ = 1834394016.

The previous prime is 6428186581. The next prime is 6428186651. The reversal of 6428186646 is 6466818246.

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 15 ways as a sum of consecutive naturals, for example, 57801 + ... + 127268.

It is an arithmetic number, because the mean of its divisors is an integer number (459713880).

Almost surely, 2^6428186646 is an apocalyptic number.

6428186646 is an abundant number, since it is smaller than the sum of its proper divisors (8282657514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6428186646 is a wasteful number, since it uses less digits than its factorization.

6428186646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185908.

The product of its digits is 2654208, while the sum is 51.

The square root of 6428186646 is about 80175.9729969023. The cubic root of 6428186646 is about 1859.3571839268.

The spelling of 6428186646 in words is "six billion, four hundred twenty-eight million, one hundred eighty-six thousand, six hundred forty-six".