27658616601197 has 2 divisors, whose sum is σ = 27658616601198. Its totient is φ = 27658616601196.

The previous prime is 27658616601173. The next prime is 27658616601223. The reversal of 27658616601197 is 79110661685672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18212699957956 + 9445916643241 = 4267634^2 + 3073421^2 .

It is a cyclic number.

It is not a de Polignac number, because 27658616601197 - 2¹⁶ = 27658616535661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27658616601167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13829308300598 + 13829308300599.

It is an arithmetic number, because the mean of its divisors is an integer number (13829308300599).

Almost surely, 2^{27658616601197} is an apocalyptic number.

It is an amenable number.

27658616601197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27658616601197 is an equidigital number, since it uses as much as digits as its factorization.

27658616601197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45722880, while the sum is 65.

The spelling of 27658616601197 in words is "twenty-seven trillion, six hundred fifty-eight billion, six hundred sixteen million, six hundred one thousand, one hundred ninety-seven".