27740403773 has 2 divisors, whose sum is σ = 27740403774. Its totient is φ = 27740403772.

The previous prime is 27740403739. The next prime is 27740403793. The reversal of 27740403773 is 37730404772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27467427289 + 272976484 = 165733^2 + 16522^2 .

It is a cyclic number.

It is not a de Polignac number, because 27740403773 - 2¹² = 27740399677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27740403793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13870201886 + 13870201887.

It is an arithmetic number, because the mean of its divisors is an integer number (13870201887).

Almost surely, 2^27740403773 is an apocalyptic number.

It is an amenable number.

27740403773 is a deficient number, since it is larger than the sum of its proper divisors (1).

27740403773 is an equidigital number, since it uses as much as digits as its factorization.

27740403773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691488, while the sum is 44.

Subtracting 27740403773 from its reverse (37730404772), we obtain a palindrome (9990000999).

The spelling of 27740403773 in words is "twenty-seven billion, seven hundred forty million, four hundred three thousand, seven hundred seventy-three".