6461816 has 16 divisors (see below), whose sum is σ = 12143400. Its totient is φ = 3223584.

The previous prime is 6461803. The next prime is 6461821. The reversal of 6461816 is 6181646.

It is a happy number.

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 in 3 ways as a sum of consecutive naturals, for example, 5366 + ... + 6458.

Almost surely, 2^6461816 is an apocalyptic number.

It is an amenable number.

6461816 is a deficient number, since it is larger than the sum of its proper divisors (5681584).

6461816 is a wasteful number, since it uses less digits than its factorization.

6461816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838 (or 1834 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 6461816 is about 2542.0102281462. The cubic root of 6461816 is about 186.2593983516.

The spelling of 6461816 in words is "six million, four hundred sixty-one thousand, eight hundred sixteen".