27137324509 has 2 divisors, whose sum is σ = 27137324510. Its totient is φ = 27137324508.

The previous prime is 27137324491. The next prime is 27137324561. The reversal of 27137324509 is 90542373172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25832525625 + 1304798884 = 160725^2 + 36122^2 .

It is a cyclic number.

It is not a de Polignac number, because 27137324509 - 2⁵ = 27137324477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27137324609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13568662254 + 13568662255.

It is an arithmetic number, because the mean of its divisors is an integer number (13568662255).

Almost surely, 2^27137324509 is an apocalyptic number.

It is an amenable number.

27137324509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27137324509 is an equidigital number, since it uses as much as digits as its factorization.

27137324509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 27137324509 in words is "twenty-seven billion, one hundred thirty-seven million, three hundred twenty-four thousand, five hundred nine".