27709866649 has 8 divisors (see below), whose sum is σ = 28171679040. Its totient is φ = 27248298000.

The previous prime is 27709866643. The next prime is 27709866659. The reversal of 27709866649 is 94666890772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27709866649 - 2³ = 27709866641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27709866641) 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, 175932 + ... + 293890.

It is an arithmetic number, because the mean of its divisors is an integer number (3521459880).

Almost surely, 2^27709866649 is an apocalyptic number.

It is an amenable number.

27709866649 is a deficient number, since it is larger than the sum of its proper divisors (461812391).

27709866649 is a wasteful number, since it uses less digits than its factorization.

27709866649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121871.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 27709866649 in words is "twenty-seven billion, seven hundred nine million, eight hundred sixty-six thousand, six hundred forty-nine".