27866481894 has 16 divisors (see below), whose sum is σ = 61925515440. Its totient is φ = 9288827280.

The previous prime is 27866481871. The next prime is 27866481899. The reversal of 27866481894 is 49818466872.

27866481894 is a `hidden beast` number, since 2 + 7 + 8 + 66 + 481 + 8 + 94 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27866481899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258022927 + ... + 258023034.

It is an arithmetic number, because the mean of its divisors is an integer number (3870344715).

Almost surely, 2^27866481894 is an apocalyptic number.

27866481894 is an abundant number, since it is smaller than the sum of its proper divisors (34059033546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27866481894 is a wasteful number, since it uses less digits than its factorization.

27866481894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516045972 (or 516045966 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 63.

The spelling of 27866481894 in words is "twenty-seven billion, eight hundred sixty-six million, four hundred eighty-one thousand, eight hundred ninety-four".