27867571099889 has 2 divisors, whose sum is σ = 27867571099890. Its totient is φ = 27867571099888.

The previous prime is 27867571099853. The next prime is 27867571100021. The reversal of 27867571099889 is 98899017576872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26967425562289 + 900145537600 = 5193017^2 + 948760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27867571099889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27867571099889.

It is not a weakly prime, because it can be changed into another prime (27867571099789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13933785549944 + 13933785549945.

It is an arithmetic number, because the mean of its divisors is an integer number (13933785549945).

Almost surely, 2^{27867571099889} is an apocalyptic number.

It is an amenable number.

27867571099889 is a deficient number, since it is larger than the sum of its proper divisors (1).

27867571099889 is an equidigital number, since it uses as much as digits as its factorization.

27867571099889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7681443840, while the sum is 86.

The spelling of 27867571099889 in words is "twenty-seven trillion, eight hundred sixty-seven billion, five hundred seventy-one million, ninety-nine thousand, eight hundred eighty-nine".