27370550561 has 2 divisors, whose sum is σ = 27370550562. Its totient is φ = 27370550560.

The previous prime is 27370550507. The next prime is 27370550591. The reversal of 27370550561 is 16505507372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20521995025 + 6848555536 = 143255^2 + 82756^2 .

It is a cyclic number.

It is not a de Polignac number, because 27370550561 - 2⁶ = 27370550497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27370550591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13685275280 + 13685275281.

It is an arithmetic number, because the mean of its divisors is an integer number (13685275281).

Almost surely, 2^27370550561 is an apocalyptic number.

It is an amenable number.

27370550561 is a deficient number, since it is larger than the sum of its proper divisors (1).

27370550561 is an equidigital number, since it uses as much as digits as its factorization.

27370550561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220500, while the sum is 41.

The spelling of 27370550561 in words is "twenty-seven billion, three hundred seventy million, five hundred fifty thousand, five hundred sixty-one".