27494686691 has 2 divisors, whose sum is σ = 27494686692. Its totient is φ = 27494686690.

The previous prime is 27494686621. The next prime is 27494686727. The reversal of 27494686691 is 19668649472.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27494686691 is a prime.

It is not a weakly prime, because it can be changed into another prime (27494686601) 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 as a sum of consecutive naturals, namely, 13747343345 + 13747343346.

It is an arithmetic number, because the mean of its divisors is an integer number (13747343346).

Almost surely, 2^27494686691 is an apocalyptic number.

27494686691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27494686691 is an equidigital number, since it uses as much as digits as its factorization.

27494686691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 62.

The spelling of 27494686691 in words is "twenty-seven billion, four hundred ninety-four million, six hundred eighty-six thousand, six hundred ninety-one".