27269568197 has 2 divisors, whose sum is σ = 27269568198. Its totient is φ = 27269568196.

The previous prime is 27269568187. The next prime is 27269568239. The reversal of 27269568197 is 79186596272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14317079716 + 12952488481 = 119654^2 + 113809^2 .

It is a cyclic number.

It is not a de Polignac number, because 27269568197 - 2⁴ = 27269568181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27269568187) 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, 13634784098 + 13634784099.

It is an arithmetic number, because the mean of its divisors is an integer number (13634784099).

Almost surely, 2^27269568197 is an apocalyptic number.

It is an amenable number.

27269568197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27269568197 is an equidigital number, since it uses as much as digits as its factorization.

27269568197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 62.

The spelling of 27269568197 in words is "twenty-seven billion, two hundred sixty-nine million, five hundred sixty-eight thousand, one hundred ninety-seven".