27396894517 has 2 divisors, whose sum is σ = 27396894518. Its totient is φ = 27396894516.

The previous prime is 27396894479. The next prime is 27396894557. The reversal of 27396894517 is 71549869372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20731968196 + 6664926321 = 143986^2 + 81639^2 .

It is a cyclic number.

It is not a de Polignac number, because 27396894517 - 2¹¹ = 27396892469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27396894557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13698447258 + 13698447259.

It is an arithmetic number, because the mean of its divisors is an integer number (13698447259).

Almost surely, 2^27396894517 is an apocalyptic number.

It is an amenable number.

27396894517 is a deficient number, since it is larger than the sum of its proper divisors (1).

27396894517 is an equidigital number, since it uses as much as digits as its factorization.

27396894517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 61.

The spelling of 27396894517 in words is "twenty-seven billion, three hundred ninety-six million, eight hundred ninety-four thousand, five hundred seventeen".