27243383697521 has 2 divisors, whose sum is σ = 27243383697522. Its totient is φ = 27243383697520.

The previous prime is 27243383697499. The next prime is 27243383697529. The reversal of 27243383697521 is 12579638334272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25157196333025 + 2086187364496 = 5015695^2 + 1444364^2 .

It is a cyclic number.

It is not a de Polignac number, because 27243383697521 - 2⁶ = 27243383697457 is a prime.

It is not a weakly prime, because it can be changed into another prime (27243383697529) 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, 13621691848760 + 13621691848761.

It is an arithmetic number, because the mean of its divisors is an integer number (13621691848761).

Almost surely, 2^{27243383697521} is an apocalyptic number.

It is an amenable number.

27243383697521 is a deficient number, since it is larger than the sum of its proper divisors (1).

27243383697521 is an equidigital number, since it uses as much as digits as its factorization.

27243383697521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 62.

The spelling of 27243383697521 in words is "twenty-seven trillion, two hundred forty-three billion, three hundred eighty-three million, six hundred ninety-seven thousand, five hundred twenty-one".