27171918017 has 2 divisors, whose sum is σ = 27171918018. Its totient is φ = 27171918016.

The previous prime is 27171918001. The next prime is 27171918061. The reversal of 27171918017 is 71081917172.

It is an a-pointer prime, because the next prime (27171918061) can be obtained adding 27171918017 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26948833921 + 223084096 = 164161^2 + 14936^2 .

It is a cyclic number.

It is not a de Polignac number, because 27171918017 - 2⁴ = 27171918001 is a prime.

It is not a weakly prime, because it can be changed into another prime (27171918077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13585959008 + 13585959009.

It is an arithmetic number, because the mean of its divisors is an integer number (13585959009).

Almost surely, 2^27171918017 is an apocalyptic number.

It is an amenable number.

27171918017 is a deficient number, since it is larger than the sum of its proper divisors (1).

27171918017 is an equidigital number, since it uses as much as digits as its factorization.

27171918017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 44.

The spelling of 27171918017 in words is "twenty-seven billion, one hundred seventy-one million, nine hundred eighteen thousand, seventeen".