27248717891 has 2 divisors, whose sum is σ = 27248717892. Its totient is φ = 27248717890.

The previous prime is 27248717863. The next prime is 27248717917. The reversal of 27248717891 is 19871784272.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27248717891 - 2³⁴ = 10068848707 is a prime.

It is not a weakly prime, because it can be changed into another prime (27248717831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13624358945 + 13624358946.

It is an arithmetic number, because the mean of its divisors is an integer number (13624358946).

Almost surely, 2^27248717891 is an apocalyptic number.

27248717891 is a deficient number, since it is larger than the sum of its proper divisors (1).

27248717891 is an equidigital number, since it uses as much as digits as its factorization.

27248717891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 56.

The spelling of 27248717891 in words is "twenty-seven billion, two hundred forty-eight million, seven hundred seventeen thousand, eight hundred ninety-one".