27782969398389 has 8 divisors (see below), whose sum is σ = 41159954664320. Its totient is φ = 18521979598908.

The previous prime is 27782969398363. The next prime is 27782969398391. The reversal of 27782969398389 is 98389396928772.

27782969398389 is a `hidden beast` number, since 2 + 7 + 7 + 82 + 9 + 69 + 3 + 98 + 389 = 666.

It is not a de Polignac number, because 27782969398389 - 2⁸ = 27782969398133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27782969398299 and 27782969398308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27782969391389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514499433277 + ... + 514499433330.

It is an arithmetic number, because the mean of its divisors is an integer number (5144994333040).

Almost surely, 2^{27782969398389} is an apocalyptic number.

It is an amenable number.

27782969398389 is a deficient number, since it is larger than the sum of its proper divisors (13376985265931).

27782969398389 is a wasteful number, since it uses less digits than its factorization.

27782969398389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028998866616 (or 1028998866610 counting only the distinct ones).

The product of its digits is 35554111488, while the sum is 90.

The spelling of 27782969398389 in words is "twenty-seven trillion, seven hundred eighty-two billion, nine hundred sixty-nine million, three hundred ninety-eight thousand, three hundred eighty-nine".