27132387781 has 2 divisors, whose sum is σ = 27132387782. Its totient is φ = 27132387780.

The previous prime is 27132387769. The next prime is 27132387833. The reversal of 27132387781 is 18778323172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26918964900 + 213422881 = 164070^2 + 14609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27132387781 is a prime.

It is a super-2 number, since 2×27132387781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27132387881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13566193890 + 13566193891.

It is an arithmetic number, because the mean of its divisors is an integer number (13566193891).

Almost surely, 2^27132387781 is an apocalyptic number.

It is an amenable number.

27132387781 is a deficient number, since it is larger than the sum of its proper divisors (1).

27132387781 is an equidigital number, since it uses as much as digits as its factorization.

27132387781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

The spelling of 27132387781 in words is "twenty-seven billion, one hundred thirty-two million, three hundred eighty-seven thousand, seven hundred eighty-one".