27193648687 has 2 divisors, whose sum is σ = 27193648688. Its totient is φ = 27193648686.

The previous prime is 27193648633. The next prime is 27193648717. The reversal of 27193648687 is 78684639172.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27193648687 - 2¹¹ = 27193646639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27193648187) 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, 13596824343 + 13596824344.

It is an arithmetic number, because the mean of its divisors is an integer number (13596824344).

Almost surely, 2^27193648687 is an apocalyptic number.

27193648687 is a deficient number, since it is larger than the sum of its proper divisors (1).

27193648687 is an equidigital number, since it uses as much as digits as its factorization.

27193648687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 61.

The spelling of 27193648687 in words is "twenty-seven billion, one hundred ninety-three million, six hundred forty-eight thousand, six hundred eighty-seven".