27015746689 has 4 divisors (see below), whose sum is σ = 27165005140. Its totient is φ = 26866488240.

The previous prime is 27015746677. The next prime is 27015746713. The reversal of 27015746689 is 98664751072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1218568464 + 25797178225 = 34908^2 + 160615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27015746689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27015746629) 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, 74628954 + ... + 74629315.

It is an arithmetic number, because the mean of its divisors is an integer number (6791251285).

Almost surely, 2^27015746689 is an apocalyptic number.

It is an amenable number.

27015746689 is a deficient number, since it is larger than the sum of its proper divisors (149258451).

27015746689 is a wasteful number, since it uses less digits than its factorization.

27015746689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149258450.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 27015746689 in words is "twenty-seven billion, fifteen million, seven hundred forty-six thousand, six hundred eighty-nine".