27691831712 has 48 divisors (see below), whose sum is σ = 54759893832. Its totient is φ = 13784678400.

The previous prime is 27691831691. The next prime is 27691831747. The reversal of 27691831712 is 21713819672.

It can be written as a sum of positive squares in 4 ways, for example, as 13049863696 + 14641968016 = 114236^2 + 121004^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12181808 + ... + 12184080.

Almost surely, 2^27691831712 is an apocalyptic number.

It is an amenable number.

27691831712 is a deficient number, since it is larger than the sum of its proper divisors (27068062120).

27691831712 is a wasteful number, since it uses less digits than its factorization.

27691831712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801 (or 3793 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The spelling of 27691831712 in words is "twenty-seven billion, six hundred ninety-one million, eight hundred thirty-one thousand, seven hundred twelve".