27266746217 has 2 divisors, whose sum is σ = 27266746218. Its totient is φ = 27266746216.

The previous prime is 27266746201. The next prime is 27266746223. The reversal of 27266746217 is 71264766272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26185388761 + 1081357456 = 161819^2 + 32884^2 .

It is a cyclic number.

It is not a de Polignac number, because 27266746217 - 2⁴ = 27266746201 is a prime.

It is a super-2 number, since 2×27266746217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27266746237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13633373108 + 13633373109.

It is an arithmetic number, because the mean of its divisors is an integer number (13633373109).

Almost surely, 2^27266746217 is an apocalyptic number.

It is an amenable number.

27266746217 is a deficient number, since it is larger than the sum of its proper divisors (1).

27266746217 is an equidigital number, since it uses as much as digits as its factorization.

27266746217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2370816, while the sum is 50.

The spelling of 27266746217 in words is "twenty-seven billion, two hundred sixty-six million, seven hundred forty-six thousand, two hundred seventeen".