27808235352197 has 2 divisors, whose sum is σ = 27808235352198. Its totient is φ = 27808235352196.

The previous prime is 27808235352133. The next prime is 27808235352229. The reversal of 27808235352197 is 79125353280872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20849871939556 + 6958363412641 = 4566166^2 + 2637871^2 .

It is a cyclic number.

It is not a de Polignac number, because 27808235352197 - 2⁶ = 27808235352133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27808235352097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13904117676098 + 13904117676099.

It is an arithmetic number, because the mean of its divisors is an integer number (13904117676099).

Almost surely, 2^{27808235352197} is an apocalyptic number.

It is an amenable number.

27808235352197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27808235352197 is an equidigital number, since it uses as much as digits as its factorization.

27808235352197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 27808235352197 in words is "twenty-seven trillion, eight hundred eight billion, two hundred thirty-five million, three hundred fifty-two thousand, one hundred ninety-seven".