6418128487 has 2 divisors, whose sum is σ = 6418128488. Its totient is φ = 6418128486.

The previous prime is 6418128421. The next prime is 6418128491. The reversal of 6418128487 is 7848218146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6418128487 - 2¹¹ = 6418126439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6418128487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6418128887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209064243 + 3209064244.

It is an arithmetic number, because the mean of its divisors is an integer number (3209064244).

Almost surely, 2^6418128487 is an apocalyptic number.

6418128487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6418128487 is an equidigital number, since it uses as much as digits as its factorization.

6418128487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 49.

The square root of 6418128487 is about 80113.2229223116. Note that the first 3 decimals coincide. The cubic root of 6418128487 is about 1858.3869013325.

The spelling of 6418128487 in words is "six billion, four hundred eighteen million, one hundred twenty-eight thousand, four hundred eighty-seven".