27694336128 has 32 divisors (see below), whose sum is σ = 73563081360. Its totient is φ = 9231445248.

The previous prime is 27694336121. The next prime is 27694336151. The reversal of 27694336128 is 82163349672.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (27694336121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36059950 + ... + 36060717.

Almost surely, 2^27694336128 is an apocalyptic number.

It is an amenable number.

27694336128 is an abundant number, since it is smaller than the sum of its proper divisors (45868745232).

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

27694336128 is an equidigital number, since it uses as much as digits as its factorization.

27694336128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72120684 (or 72120672 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 51.

The spelling of 27694336128 in words is "twenty-seven billion, six hundred ninety-four million, three hundred thirty-six thousand, one hundred twenty-eight".