27198325709 has 2 divisors, whose sum is σ = 27198325710. Its totient is φ = 27198325708.

The previous prime is 27198325703. The next prime is 27198325711. The reversal of 27198325709 is 90752389172.

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., 26790487684 + 407838025 = 163678^2 + 20195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27198325709 is a prime.

Together with 27198325711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27198325703) 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, 13599162854 + 13599162855.

It is an arithmetic number, because the mean of its divisors is an integer number (13599162855).

Almost surely, 2^27198325709 is an apocalyptic number.

It is an amenable number.

27198325709 is a deficient number, since it is larger than the sum of its proper divisors (1).

27198325709 is an equidigital number, since it uses as much as digits as its factorization.

27198325709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 27198325709 in words is "twenty-seven billion, one hundred ninety-eight million, three hundred twenty-five thousand, seven hundred nine".