6409556 has 6 divisors (see below), whose sum is σ = 11216730. Its totient is φ = 3204776.

The previous prime is 6409549. The next prime is 6409577. The reversal of 6409556 is 6559046.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4477456 + 1932100 = 2116^2 + 1390^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801191 + ... + 801198.

It is an arithmetic number, because the mean of its divisors is an integer number (1869455).

Almost surely, 2^6409556 is an apocalyptic number.

It is an amenable number.

6409556 is a deficient number, since it is larger than the sum of its proper divisors (4807174).

6409556 is a wasteful number, since it uses less digits than its factorization.

6409556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602393 (or 1602391 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 6409556 is about 2531.7100939879. The cubic root of 6409556 is about 185.7559136889.

The spelling of 6409556 in words is "six million, four hundred nine thousand, five hundred fifty-six".