27691917769169 has 2 divisors, whose sum is σ = 27691917769170. Its totient is φ = 27691917769168.

The previous prime is 27691917769141. The next prime is 27691917769193. The reversal of 27691917769169 is 96196771919672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26872871049025 + 819046720144 = 5183905^2 + 905012^2 .

It is a cyclic number.

It is not a de Polignac number, because 27691917769169 - 2³² = 27687622801873 is a prime.

It is a super-2 number, since 2×27691917769169² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27691917769093 and 27691917769102.

It is not a weakly prime, because it can be changed into another prime (27691917769669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13845958884584 + 13845958884585.

It is an arithmetic number, because the mean of its divisors is an integer number (13845958884585).

Almost surely, 2^{27691917769169} is an apocalyptic number.

It is an amenable number.

27691917769169 is a deficient number, since it is larger than the sum of its proper divisors (1).

27691917769169 is an equidigital number, since it uses as much as digits as its factorization.

27691917769169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972182736, while the sum is 80.

The spelling of 27691917769169 in words is "twenty-seven trillion, six hundred ninety-one billion, nine hundred seventeen million, seven hundred sixty-nine thousand, one hundred sixty-nine".