27754567877 has 2 divisors, whose sum is σ = 27754567878. Its totient is φ = 27754567876.

The previous prime is 27754567849. The next prime is 27754567891. The reversal of 27754567877 is 77876545772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19486484836 + 8268083041 = 139594^2 + 90929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27754567877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27754567837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13877283938 + 13877283939.

It is an arithmetic number, because the mean of its divisors is an integer number (13877283939).

Almost surely, 2^27754567877 is an apocalyptic number.

It is an amenable number.

27754567877 is a deficient number, since it is larger than the sum of its proper divisors (1).

27754567877 is an equidigital number, since it uses as much as digits as its factorization.

27754567877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161347200, while the sum is 65.

The spelling of 27754567877 in words is "twenty-seven billion, seven hundred fifty-four million, five hundred sixty-seven thousand, eight hundred seventy-seven".