27806198723 has 2 divisors, whose sum is σ = 27806198724. Its totient is φ = 27806198722.

The previous prime is 27806198713. The next prime is 27806198737. The reversal of 27806198723 is 32789160872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27806198723 - 2³⁰ = 26732456899 is a prime.

It is not a weakly prime, because it can be changed into another prime (27806198713) 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, 13903099361 + 13903099362.

It is an arithmetic number, because the mean of its divisors is an integer number (13903099362).

Almost surely, 2^27806198723 is an apocalyptic number.

27806198723 is a deficient number, since it is larger than the sum of its proper divisors (1).

27806198723 is an equidigital number, since it uses as much as digits as its factorization.

27806198723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 27806198723 in words is "twenty-seven billion, eight hundred six million, one hundred ninety-eight thousand, seven hundred twenty-three".