27755277749989 has 2 divisors, whose sum is σ = 27755277749990. Its totient is φ = 27755277749988.

The previous prime is 27755277749977. The next prime is 27755277749999. The reversal of 27755277749989 is 98994777255772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27038856012100 + 716421737889 = 5199890^2 + 846417^2 .

It is a cyclic number.

It is not a de Polignac number, because 27755277749989 - 2⁷ = 27755277749861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27755277749999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13877638874994 + 13877638874995.

It is an arithmetic number, because the mean of its divisors is an integer number (13877638874995).

Almost surely, 2^{27755277749989} is an apocalyptic number.

It is an amenable number.

27755277749989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27755277749989 is an equidigital number, since it uses as much as digits as its factorization.

27755277749989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39207369600, while the sum is 88.

The spelling of 27755277749989 in words is "twenty-seven trillion, seven hundred fifty-five billion, two hundred seventy-seven million, seven hundred forty-nine thousand, nine hundred eighty-nine".