6423319148509 has 2 divisors, whose sum is σ = 6423319148510. Its totient is φ = 6423319148508.

The previous prime is 6423319148507. The next prime is 6423319148527. The reversal of 6423319148509 is 9058419133246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4943196288900 + 1480122859609 = 2223330^2 + 1216603^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423319148509 - 2¹ = 6423319148507 is a prime.

Together with 6423319148507, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6423319148509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6423319148507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211659574254 + 3211659574255.

It is an arithmetic number, because the mean of its divisors is an integer number (3211659574255).

Almost surely, 2^{6423319148509} is an apocalyptic number.

It is an amenable number.

6423319148509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6423319148509 is an equidigital number, since it uses as much as digits as its factorization.

6423319148509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 6423319148509 in words is "six trillion, four hundred twenty-three billion, three hundred nineteen million, one hundred forty-eight thousand, five hundred nine".