27771641603 has 2 divisors, whose sum is σ = 27771641604. Its totient is φ = 27771641602.

The previous prime is 27771641591. The next prime is 27771641687. The reversal of 27771641603 is 30614617772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27771641603 - 2⁶ = 27771641539 is a prime.

It is not a weakly prime, because it can be changed into another prime (27771641003) 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, 13885820801 + 13885820802.

It is an arithmetic number, because the mean of its divisors is an integer number (13885820802).

Almost surely, 2^27771641603 is an apocalyptic number.

27771641603 is a deficient number, since it is larger than the sum of its proper divisors (1).

27771641603 is an equidigital number, since it uses as much as digits as its factorization.

27771641603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 44.

The spelling of 27771641603 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty-one thousand, six hundred three".