6738516509 has 2 divisors, whose sum is σ = 6738516510. Its totient is φ = 6738516508.

The previous prime is 6738516503. The next prime is 6738516529. The reversal of 6738516509 is 9056158376.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4388400025 + 2350116484 = 66245^2 + 48478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6738516509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6738516503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3369258254 + 3369258255.

It is an arithmetic number, because the mean of its divisors is an integer number (3369258255).

Almost surely, 2^6738516509 is an apocalyptic number.

It is an amenable number.

6738516509 is a deficient number, since it is larger than the sum of its proper divisors (1).

6738516509 is an equidigital number, since it uses as much as digits as its factorization.

6738516509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 6738516509 is about 82088.4675761462. The cubic root of 6738516509 is about 1888.8092411707.

The spelling of 6738516509 in words is "six billion, seven hundred thirty-eight million, five hundred sixteen thousand, five hundred nine".