27171912253 has 2 divisors, whose sum is σ = 27171912254. Its totient is φ = 27171912252.

The previous prime is 27171912233. The next prime is 27171912281. The reversal of 27171912253 is 35221917172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27171236569 + 675684 = 164837^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 27171912253 - 2⁵ = 27171912221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27171912233) 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, 13585956126 + 13585956127.

It is an arithmetic number, because the mean of its divisors is an integer number (13585956127).

Almost surely, 2^27171912253 is an apocalyptic number.

It is an amenable number.

27171912253 is a deficient number, since it is larger than the sum of its proper divisors (1).

27171912253 is an equidigital number, since it uses as much as digits as its factorization.

27171912253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The spelling of 27171912253 in words is "twenty-seven billion, one hundred seventy-one million, nine hundred twelve thousand, two hundred fifty-three".