27642655171213 has 2 divisors, whose sum is σ = 27642655171214. Its totient is φ = 27642655171212.

The previous prime is 27642655171121. The next prime is 27642655171223. The reversal of 27642655171213 is 31217155624672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25337350438884 + 2305304732329 = 5033622^2 + 1518323^2 .

It is a cyclic number.

It is not a de Polignac number, because 27642655171213 - 2²¹ = 27642653074061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27642655171223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13821327585606 + 13821327585607.

It is an arithmetic number, because the mean of its divisors is an integer number (13821327585607).

Almost surely, 2^{27642655171213} is an apocalyptic number.

It is an amenable number.

27642655171213 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642655171213 is an equidigital number, since it uses as much as digits as its factorization.

27642655171213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 52.

The spelling of 27642655171213 in words is "twenty-seven trillion, six hundred forty-two billion, six hundred fifty-five million, one hundred seventy-one thousand, two hundred thirteen".