6927240981809 has 2 divisors, whose sum is σ = 6927240981810. Its totient is φ = 6927240981808.

The previous prime is 6927240981757. The next prime is 6927240981811. The reversal of 6927240981809 is 9081890427296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6274624206400 + 652616775409 = 2504920^2 + 807847^2 .

It is a cyclic number.

It is not a de Polignac number, because 6927240981809 - 2³² = 6922946014513 is a prime.

Together with 6927240981811, 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 (6927440981809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3463620490904 + 3463620490905.

It is an arithmetic number, because the mean of its divisors is an integer number (3463620490905).

Almost surely, 2^{6927240981809} is an apocalyptic number.

It is an amenable number.

6927240981809 is a deficient number, since it is larger than the sum of its proper divisors (1).

6927240981809 is an equidigital number, since it uses as much as digits as its factorization.

6927240981809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31352832, while the sum is 65.

The spelling of 6927240981809 in words is "six trillion, nine hundred twenty-seven billion, two hundred forty million, nine hundred eighty-one thousand, eight hundred nine".