27043613609 has 2 divisors, whose sum is σ = 27043613610. Its totient is φ = 27043613608.

The previous prime is 27043613593. The next prime is 27043613699. The reversal of 27043613609 is 90631634072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22133107984 + 4910505625 = 148772^2 + 70075^2 .

It is a cyclic number.

It is not a de Polignac number, because 27043613609 - 2⁴ = 27043613593 is a prime.

It is not a weakly prime, because it can be changed into another prime (27043613699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521806804 + 13521806805.

It is an arithmetic number, because the mean of its divisors is an integer number (13521806805).

Almost surely, 2^27043613609 is an apocalyptic number.

It is an amenable number.

27043613609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27043613609 is an equidigital number, since it uses as much as digits as its factorization.

27043613609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 27043613609 in words is "twenty-seven billion, forty-three million, six hundred thirteen thousand, six hundred nine".