6511368893 has 2 divisors, whose sum is σ = 6511368894. Its totient is φ = 6511368892.

The previous prime is 6511368833. The next prime is 6511368907. The reversal of 6511368893 is 3988631156.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5296637284 + 1214731609 = 72778^2 + 34853^2 .

It is a cyclic number.

It is not a de Polignac number, because 6511368893 - 2²² = 6507174589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6511368833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3255684446 + 3255684447.

It is an arithmetic number, because the mean of its divisors is an integer number (3255684447).

Almost surely, 2^6511368893 is an apocalyptic number.

It is an amenable number.

6511368893 is a deficient number, since it is larger than the sum of its proper divisors (1).

6511368893 is an equidigital number, since it uses as much as digits as its factorization.

6511368893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 6511368893 is about 80693.0535610098. The cubic root of 6511368893 is about 1867.3430092752.

The spelling of 6511368893 in words is "six billion, five hundred eleven million, three hundred sixty-eight thousand, eight hundred ninety-three".