27108586691 has 2 divisors, whose sum is σ = 27108586692. Its totient is φ = 27108586690.

The previous prime is 27108586613. The next prime is 27108586723. The reversal of 27108586691 is 19668580172.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27108586691 is a prime.

It is not a weakly prime, because it can be changed into another prime (27108586891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13554293345 + 13554293346.

It is an arithmetic number, because the mean of its divisors is an integer number (13554293346).

Almost surely, 2^27108586691 is an apocalyptic number.

27108586691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27108586691 is an equidigital number, since it uses as much as digits as its factorization.

27108586691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 27108586691 in words is "twenty-seven billion, one hundred eight million, five hundred eighty-six thousand, six hundred ninety-one".