27747520673 has 2 divisors, whose sum is σ = 27747520674. Its totient is φ = 27747520672.

The previous prime is 27747520621. The next prime is 27747520693. The reversal of 27747520673 is 37602574772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23374740544 + 4372780129 = 152888^2 + 66127^2 .

It is a cyclic number.

It is not a de Polignac number, because 27747520673 - 2⁸ = 27747520417 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 (27747520693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13873760336 + 13873760337.

It is an arithmetic number, because the mean of its divisors is an integer number (13873760337).

Almost surely, 2^27747520673 is an apocalyptic number.

It is an amenable number.

27747520673 is a deficient number, since it is larger than the sum of its proper divisors (1).

27747520673 is an equidigital number, since it uses as much as digits as its factorization.

27747520673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3457440, while the sum is 50.

The spelling of 27747520673 in words is "twenty-seven billion, seven hundred forty-seven million, five hundred twenty thousand, six hundred seventy-three".