27360842009 has 2 divisors, whose sum is σ = 27360842010. Its totient is φ = 27360842008.

The previous prime is 27360841957. The next prime is 27360842011. The reversal of 27360842009 is 90024806372.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27358152409 + 2689600 = 165403^2 + 1640^2 .

It is a cyclic number.

It is not a de Polignac number, because 27360842009 - 2²⁴ = 27344064793 is a prime.

Together with 27360842011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27360842039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13680421004 + 13680421005.

It is an arithmetic number, because the mean of its divisors is an integer number (13680421005).

Almost surely, 2^27360842009 is an apocalyptic number.

It is an amenable number.

27360842009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27360842009 is an equidigital number, since it uses as much as digits as its factorization.

27360842009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 27360842009 in words is "twenty-seven billion, three hundred sixty million, eight hundred forty-two thousand, nine".