27056013521 has 2 divisors, whose sum is σ = 27056013522. Its totient is φ = 27056013520.

The previous prime is 27056013497. The next prime is 27056013527. The reversal of 27056013521 is 12531065072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17434561600 + 9621451921 = 132040^2 + 98089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27056013521 is a prime.

It is not a weakly prime, because it can be changed into another prime (27056013527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13528006760 + 13528006761.

It is an arithmetic number, because the mean of its divisors is an integer number (13528006761).

Almost surely, 2^27056013521 is an apocalyptic number.

It is an amenable number.

27056013521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27056013521 is an equidigital number, since it uses as much as digits as its factorization.

27056013521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

Adding to 27056013521 its reverse (12531065072), we get a palindrome (39587078593).

The spelling of 27056013521 in words is "twenty-seven billion, fifty-six million, thirteen thousand, five hundred twenty-one".