27979680011 has 4 divisors (see below), whose sum is σ = 27982314672. Its totient is φ = 27977045352.

The previous prime is 27979679999. The next prime is 27979680103. The reversal of 27979680011 is 11008697972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27979680011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27979680511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301336 + ... + 1322661.

It is an arithmetic number, because the mean of its divisors is an integer number (6995578668).

Almost surely, 2^27979680011 is an apocalyptic number.

27979680011 is a deficient number, since it is larger than the sum of its proper divisors (2634661).

27979680011 is a wasteful number, since it uses less digits than its factorization.

27979680011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634660.

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 27979680011 in words is "twenty-seven billion, nine hundred seventy-nine million, six hundred eighty thousand, eleven".