27717245489 has 2 divisors, whose sum is σ = 27717245490. Its totient is φ = 27717245488.

The previous prime is 27717245471. The next prime is 27717245527. The reversal of 27717245489 is 98454271772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19802118400 + 7915127089 = 140720^2 + 88967^2 .

It is a cyclic number.

It is not a de Polignac number, because 27717245489 - 2²⁴ = 27700468273 is a prime.

It is not a weakly prime, because it can be changed into another prime (27717245419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13858622744 + 13858622745.

It is an arithmetic number, because the mean of its divisors is an integer number (13858622745).

Almost surely, 2^27717245489 is an apocalyptic number.

It is an amenable number.

27717245489 is a deficient number, since it is larger than the sum of its proper divisors (1).

27717245489 is an equidigital number, since it uses as much as digits as its factorization.

27717245489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7902720, while the sum is 56.

The spelling of 27717245489 in words is "twenty-seven billion, seven hundred seventeen million, two hundred forty-five thousand, four hundred eighty-nine".