6548513789 has 2 divisors, whose sum is σ = 6548513790. Its totient is φ = 6548513788.

The previous prime is 6548513779. The next prime is 6548513801. The reversal of 6548513789 is 9873158456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4335564025 + 2212949764 = 65845^2 + 47042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6548513789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6548513779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3274256894 + 3274256895.

It is an arithmetic number, because the mean of its divisors is an integer number (3274256895).

Almost surely, 2^6548513789 is an apocalyptic number.

It is an amenable number.

6548513789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6548513789 is an equidigital number, since it uses as much as digits as its factorization.

6548513789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 56.

The square root of 6548513789 is about 80922.8879180668. The cubic root of 6548513789 is about 1870.8871070055.

The spelling of 6548513789 in words is "six billion, five hundred forty-eight million, five hundred thirteen thousand, seven hundred eighty-nine".