27061243609 has 2 divisors, whose sum is σ = 27061243610. Its totient is φ = 27061243608.

The previous prime is 27061243589. The next prime is 27061243669. The reversal of 27061243609 is 90634216072.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24923568384 + 2137675225 = 157872^2 + 46235^2 .

It is a cyclic number.

It is not a de Polignac number, because 27061243609 - 2¹¹ = 27061241561 is a prime.

It is not a weakly prime, because it can be changed into another prime (27061243669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13530621804 + 13530621805.

It is an arithmetic number, because the mean of its divisors is an integer number (13530621805).

Almost surely, 2^27061243609 is an apocalyptic number.

It is an amenable number.

27061243609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27061243609 is an equidigital number, since it uses as much as digits as its factorization.

27061243609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 27061243609 in words is "twenty-seven billion, sixty-one million, two hundred forty-three thousand, six hundred nine".