6743201681 has 2 divisors, whose sum is σ = 6743201682. Its totient is φ = 6743201680.

The previous prime is 6743201639. The next prime is 6743201683. The reversal of 6743201681 is 1861023476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6338548225 + 404653456 = 79615^2 + 20116^2 .

It is a cyclic number.

It is not a de Polignac number, because 6743201681 - 2¹⁰ = 6743200657 is a prime.

It is a super-2 number, since 2×6743201681² = 90941537821282451522, which contains 22 as substring.

Together with 6743201683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6743201683) 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, 3371600840 + 3371600841.

It is an arithmetic number, because the mean of its divisors is an integer number (3371600841).

Almost surely, 2^6743201681 is an apocalyptic number.

It is an amenable number.

6743201681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6743201681 is an equidigital number, since it uses as much as digits as its factorization.

6743201681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 6743201681 is about 82116.9999512890. Note that the first 4 decimals coincide. The cubic root of 6743201681 is about 1889.2468917034.

The spelling of 6743201681 in words is "six billion, seven hundred forty-three million, two hundred one thousand, six hundred eighty-one".