27800655871 has 2 divisors, whose sum is σ = 27800655872. Its totient is φ = 27800655870.

The previous prime is 27800655853. The next prime is 27800655947. The reversal of 27800655871 is 17855600872.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27800655871 - 2²⁷ = 27666438143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27800655821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13900327935 + 13900327936.

It is an arithmetic number, because the mean of its divisors is an integer number (13900327936).

Almost surely, 2^27800655871 is an apocalyptic number.

27800655871 is a deficient number, since it is larger than the sum of its proper divisors (1).

27800655871 is an equidigital number, since it uses as much as digits as its factorization.

27800655871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 27800655871 in words is "twenty-seven billion, eight hundred million, six hundred fifty-five thousand, eight hundred seventy-one".