27891118233 has 20 divisors (see below), whose sum is σ = 45452194128. Its totient is φ = 16903707480.

The previous prime is 27891118193. The next prime is 27891118273. The reversal of 27891118233 is 33281119872.

It is an interprime number because it is at equal distance from previous prime (27891118193) and next prime (27891118273).

It is not a de Polignac number, because 27891118233 - 2¹⁰ = 27891117209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27891118273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15650691 + ... + 15652472.

Almost surely, 2^27891118233 is an apocalyptic number.

It is an amenable number.

27891118233 is a deficient number, since it is larger than the sum of its proper divisors (17561075895).

27891118233 is a wasteful number, since it uses less digits than its factorization.

27891118233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31303186 (or 31303177 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The spelling of 27891118233 in words is "twenty-seven billion, eight hundred ninety-one million, one hundred eighteen thousand, two hundred thirty-three".