27548222861 has 2 divisors, whose sum is σ = 27548222862. Its totient is φ = 27548222860.

The previous prime is 27548222857. The next prime is 27548222927. The reversal of 27548222861 is 16822284572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17669055625 + 9879167236 = 132925^2 + 99394^2 .

It is a cyclic number.

It is not a de Polignac number, because 27548222861 - 2² = 27548222857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27548222161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13774111430 + 13774111431.

It is an arithmetic number, because the mean of its divisors is an integer number (13774111431).

Almost surely, 2^27548222861 is an apocalyptic number.

It is an amenable number.

27548222861 is a deficient number, since it is larger than the sum of its proper divisors (1).

27548222861 is an equidigital number, since it uses as much as digits as its factorization.

27548222861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 47.

The spelling of 27548222861 in words is "twenty-seven billion, five hundred forty-eight million, two hundred twenty-two thousand, eight hundred sixty-one".