27800766473 has 2 divisors, whose sum is σ = 27800766474. Its totient is φ = 27800766472.

The previous prime is 27800766463. The next prime is 27800766529. The reversal of 27800766473 is 37466700872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26623796224 + 1176970249 = 163168^2 + 34307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27800766473 is a prime.

It is not a weakly prime, because it can be changed into another prime (27800766403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900383236 + 13900383237.

It is an arithmetic number, because the mean of its divisors is an integer number (13900383237).

Almost surely, 2^27800766473 is an apocalyptic number.

It is an amenable number.

27800766473 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800766473 is an equidigital number, since it uses as much as digits as its factorization.

27800766473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 50.

The spelling of 27800766473 in words is "twenty-seven billion, eight hundred million, seven hundred sixty-six thousand, four hundred seventy-three".