27118988417 has 2 divisors, whose sum is σ = 27118988418. Its totient is φ = 27118988416.

The previous prime is 27118988383. The next prime is 27118988423. The reversal of 27118988417 is 71488981172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19276823281 + 7842165136 = 138841^2 + 88556^2 .

It is a cyclic number.

It is not a de Polignac number, because 27118988417 - 2²⁶ = 27051879553 is a prime.

It is a super-2 number, since 2×27118988417² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27118988447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13559494208 + 13559494209.

It is an arithmetic number, because the mean of its divisors is an integer number (13559494209).

Almost surely, 2^27118988417 is an apocalyptic number.

It is an amenable number.

27118988417 is a deficient number, since it is larger than the sum of its proper divisors (1).

27118988417 is an equidigital number, since it uses as much as digits as its factorization.

27118988417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1806336, while the sum is 56.

The spelling of 27118988417 in words is "twenty-seven billion, one hundred eighteen million, nine hundred eighty-eight thousand, four hundred seventeen".