27112017509 has 2 divisors, whose sum is σ = 27112017510. Its totient is φ = 27112017508.

The previous prime is 27112017481. The next prime is 27112017551. The reversal of 27112017509 is 90571021172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20385557284 + 6726460225 = 142778^2 + 82015^2 .

It is a cyclic number.

It is not a de Polignac number, because 27112017509 - 2¹² = 27112013413 is a prime.

It is a super-2 number, since 2×27112017509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27112017589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13556008754 + 13556008755.

It is an arithmetic number, because the mean of its divisors is an integer number (13556008755).

Almost surely, 2^27112017509 is an apocalyptic number.

It is an amenable number.

27112017509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27112017509 is an equidigital number, since it uses as much as digits as its factorization.

27112017509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 35.

The spelling of 27112017509 in words is "twenty-seven billion, one hundred twelve million, seventeen thousand, five hundred nine".