27877853893 has 2 divisors, whose sum is σ = 27877853894. Its totient is φ = 27877853892.

The previous prime is 27877853881. The next prime is 27877853921. The reversal of 27877853893 is 39835877872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26314679524 + 1563174369 = 162218^2 + 39537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27877853893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27877853813) 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, 13938926946 + 13938926947.

It is an arithmetic number, because the mean of its divisors is an integer number (13938926947).

Almost surely, 2^27877853893 is an apocalyptic number.

It is an amenable number.

27877853893 is a deficient number, since it is larger than the sum of its proper divisors (1).

27877853893 is an equidigital number, since it uses as much as digits as its factorization.

27877853893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142248960, while the sum is 67.

The spelling of 27877853893 in words is "twenty-seven billion, eight hundred seventy-seven million, eight hundred fifty-three thousand, eight hundred ninety-three".