27251996197 has 2 divisors, whose sum is σ = 27251996198. Its totient is φ = 27251996196.

The previous prime is 27251996159. The next prime is 27251996209. The reversal of 27251996197 is 79169915272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23352118596 + 3899877601 = 152814^2 + 62449^2 .

It is a cyclic number.

It is not a de Polignac number, because 27251996197 - 2⁷ = 27251996069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27251999197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13625998098 + 13625998099.

It is an arithmetic number, because the mean of its divisors is an integer number (13625998099).

Almost surely, 2^27251996197 is an apocalyptic number.

It is an amenable number.

27251996197 is a deficient number, since it is larger than the sum of its proper divisors (1).

27251996197 is an equidigital number, since it uses as much as digits as its factorization.

27251996197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 58.

The spelling of 27251996197 in words is "twenty-seven billion, two hundred fifty-one million, nine hundred ninety-six thousand, one hundred ninety-seven".