27800173091 has 2 divisors, whose sum is σ = 27800173092. Its totient is φ = 27800173090.

The previous prime is 27800173081. The next prime is 27800173099. The reversal of 27800173091 is 19037100872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27800173091 - 2¹⁴ = 27800156707 is a prime.

It is not a weakly prime, because it can be changed into another prime (27800173099) 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, 13900086545 + 13900086546.

It is an arithmetic number, because the mean of its divisors is an integer number (13900086546).

Almost surely, 2^27800173091 is an apocalyptic number.

27800173091 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800173091 is an equidigital number, since it uses as much as digits as its factorization.

27800173091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 27800173091 in words is "twenty-seven billion, eight hundred million, one hundred seventy-three thousand, ninety-one".