27731466691 has 2 divisors, whose sum is σ = 27731466692. Its totient is φ = 27731466690.

The previous prime is 27731466641. The next prime is 27731466709. The reversal of 27731466691 is 19666413772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27731466691 - 2¹¹ = 27731464643 is a prime.

It is not a weakly prime, because it can be changed into another prime (27731466641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13865733345 + 13865733346.

It is an arithmetic number, because the mean of its divisors is an integer number (13865733346).

Almost surely, 2^27731466691 is an apocalyptic number.

27731466691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27731466691 is an equidigital number, since it uses as much as digits as its factorization.

27731466691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The spelling of 27731466691 in words is "twenty-seven billion, seven hundred thirty-one million, four hundred sixty-six thousand, six hundred ninety-one".