27478268089 has 2 divisors, whose sum is σ = 27478268090. Its totient is φ = 27478268088.

The previous prime is 27478268039. The next prime is 27478268099. The reversal of 27478268089 is 98086287472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26024142400 + 1454125689 = 161320^2 + 38133^2 .

It is a cyclic number.

It is not a de Polignac number, because 27478268089 - 2¹¹ = 27478266041 is a prime.

It is not a weakly prime, because it can be changed into another prime (27478268039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13739134044 + 13739134045.

It is an arithmetic number, because the mean of its divisors is an integer number (13739134045).

Almost surely, 2^27478268089 is an apocalyptic number.

It is an amenable number.

27478268089 is a deficient number, since it is larger than the sum of its proper divisors (1).

27478268089 is an equidigital number, since it uses as much as digits as its factorization.

27478268089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21676032, while the sum is 61.

The spelling of 27478268089 in words is "twenty-seven billion, four hundred seventy-eight million, two hundred sixty-eight thousand, eighty-nine".