27910008691 has 4 divisors (see below), whose sum is σ = 28810331584. Its totient is φ = 27009685800.

The previous prime is 27910008649. The next prime is 27910008727. The reversal of 27910008691 is 19680001972.

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

It is a cyclic number.

It is not a de Polignac number, because 27910008691 - 2¹⁹ = 27909484403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27910008601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450161400 + ... + 450161461.

It is an arithmetic number, because the mean of its divisors is an integer number (7202582896).

Almost surely, 2^27910008691 is an apocalyptic number.

27910008691 is a deficient number, since it is larger than the sum of its proper divisors (900322893).

27910008691 is an equidigital number, since it uses as much as digits as its factorization.

27910008691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900322892.

The product of its (nonzero) digits is 54432, while the sum is 43.

The spelling of 27910008691 in words is "twenty-seven billion, nine hundred ten million, eight thousand, six hundred ninety-one".