27804091031917 has 2 divisors, whose sum is σ = 27804091031918. Its totient is φ = 27804091031916.

The previous prime is 27804091031903. The next prime is 27804091031939. The reversal of 27804091031917 is 71913019040872.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25977176561961 + 1826914469956 = 5096781^2 + 1351634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27804091031917 is a prime.

It is a super-2 number, since 2×27804091031917² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27804091031987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13902045515958 + 13902045515959.

It is an arithmetic number, because the mean of its divisors is an integer number (13902045515959).

Almost surely, 2^{27804091031917} is an apocalyptic number.

It is an amenable number.

27804091031917 is a deficient number, since it is larger than the sum of its proper divisors (1).

27804091031917 is an equidigital number, since it uses as much as digits as its factorization.

27804091031917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 27804091031917 in words is "twenty-seven trillion, eight hundred four billion, ninety-one million, thirty-one thousand, nine hundred seventeen".