6480643867 has 2 divisors, whose sum is σ = 6480643868. Its totient is φ = 6480643866.

The previous prime is 6480643849. The next prime is 6480643877. The reversal of 6480643867 is 7683460846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6480643867 - 2¹¹ = 6480641819 is a prime.

It is not a weakly prime, because it can be changed into another prime (6480643877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3240321933 + 3240321934.

It is an arithmetic number, because the mean of its divisors is an integer number (3240321934).

Almost surely, 2^6480643867 is an apocalyptic number.

6480643867 is a deficient number, since it is larger than the sum of its proper divisors (1).

6480643867 is an equidigital number, since it uses as much as digits as its factorization.

6480643867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 52.

The square root of 6480643867 is about 80502.4463417106. The cubic root of 6480643867 is about 1864.4012498134.

The spelling of 6480643867 in words is "six billion, four hundred eighty million, six hundred forty-three thousand, eight hundred sixty-seven".