6480891 has 40 divisors (see below), whose sum is σ = 10454400. Its totient is φ = 3991680.

The previous prime is 6480869. The next prime is 6480907. The reversal of 6480891 is 1980846.

It is a happy number.

6480891 is a `hidden beast` number, since 648 + 0 + 8 + 9 + 1 = 666.

It is not a de Polignac number, because 6480891 - 2⁶ = 6480827 is a prime.

6480891 is a modest number, since divided by 891 gives 648 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6480811) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 72775 + ... + 72863.

It is an arithmetic number, because the mean of its divisors is an integer number (261360).

Almost surely, 2^6480891 is an apocalyptic number.

6480891 is a deficient number, since it is larger than the sum of its proper divisors (3973509).

6480891 is a wasteful number, since it uses less digits than its factorization.

6480891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 6480891 is about 2545.7594151844. The cubic root of 6480891 is about 186.4424948550.

The spelling of 6480891 in words is "six million, four hundred eighty thousand, eight hundred ninety-one".