6491816 has 16 divisors (see below), whose sum is σ = 12199200. Its totient is φ = 3238704.

The previous prime is 6491813. The next prime is 6491833. The reversal of 6491816 is 6181946.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6491813) 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, 6605 + ... + 7523.

It is an arithmetic number, because the mean of its divisors is an integer number (762450).

Almost surely, 2^6491816 is an apocalyptic number.

It is an amenable number.

6491816 is a deficient number, since it is larger than the sum of its proper divisors (5707384).

6491816 is a wasteful number, since it uses less digits than its factorization.

6491816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808 (or 1804 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 6491816 is about 2547.9042368190. The cubic root of 6491816 is about 186.5471996343.

The spelling of 6491816 in words is "six million, four hundred ninety-one thousand, eight hundred sixteen".