27317707691 has 16 divisors (see below), whose sum is σ = 29311856640. Its totient is φ = 25379658720.

The previous prime is 27317707663. The next prime is 27317707721. The reversal of 27317707691 is 19670771372.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27317707691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27317707091) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2696726 + ... + 2706836.

It is an arithmetic number, because the mean of its divisors is an integer number (1831991040).

Almost surely, 2^27317707691 is an apocalyptic number.

27317707691 is a deficient number, since it is larger than the sum of its proper divisors (1994148949).

27317707691 is a wasteful number, since it uses less digits than its factorization.

27317707691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866.

The product of its (nonzero) digits is 777924, while the sum is 50.

The spelling of 27317707691 in words is "twenty-seven billion, three hundred seventeen million, seven hundred seven thousand, six hundred ninety-one".