27806581121 has 16 divisors (see below), whose sum is σ = 30641390208. Its totient is φ = 25023129600.

The previous prime is 27806581093. The next prime is 27806581123. The reversal of 27806581121 is 12118560872.

It is a cyclic number.

It is not a de Polignac number, because 27806581121 - 2³⁰ = 26732839297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27806581123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5074235 + ... + 5079711.

It is an arithmetic number, because the mean of its divisors is an integer number (1915086888).

Almost surely, 2^27806581121 is an apocalyptic number.

It is an amenable number.

27806581121 is a deficient number, since it is larger than the sum of its proper divisors (2834809087).

27806581121 is a wasteful number, since it uses less digits than its factorization.

27806581121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072.

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 27806581121 in words is "twenty-seven billion, eight hundred six million, five hundred eighty-one thousand, one hundred twenty-one".