6801816493 has 2 divisors, whose sum is σ = 6801816494. Its totient is φ = 6801816492.

The previous prime is 6801816491. The next prime is 6801816521. The reversal of 6801816493 is 3946181086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4691976004 + 2109840489 = 68498^2 + 45933^2 .

It is a cyclic number.

It is not a de Polignac number, because 6801816493 - 2¹ = 6801816491 is a prime.

Together with 6801816491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6801816491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3400908246 + 3400908247.

It is an arithmetic number, because the mean of its divisors is an integer number (3400908247).

Almost surely, 2^6801816493 is an apocalyptic number.

It is an amenable number.

6801816493 is a deficient number, since it is larger than the sum of its proper divisors (1).

6801816493 is an equidigital number, since it uses as much as digits as its factorization.

6801816493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 6801816493 is about 82473.1258835264. The cubic root of 6801816493 is about 1894.7051560313.

The spelling of 6801816493 in words is "six billion, eight hundred one million, eight hundred sixteen thousand, four hundred ninety-three".