27966938489489 has 4 divisors (see below), whose sum is σ = 27988336301424. Its totient is φ = 27945540677556.

The previous prime is 27966938489473. The next prime is 27966938489491. The reversal of 27966938489489 is 98498483966972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27966938489489 - 2⁴ = 27966938489473 is a prime.

It is a super-2 number, since 2×27966938489489² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27966938489398 and 27966938489407.

It is not an unprimeable number, because it can be changed into a prime (27966938485489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10698904007 + ... + 10698906620.

It is an arithmetic number, because the mean of its divisors is an integer number (6997084075356).

Almost surely, 2^{27966938489489} is an apocalyptic number.

It is an amenable number.

27966938489489 is a deficient number, since it is larger than the sum of its proper divisors (21397811935).

27966938489489 is a wasteful number, since it uses less digits than its factorization.

27966938489489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21397811934.

The product of its digits is 81266540544, while the sum is 92.

The spelling of 27966938489489 in words is "twenty-seven trillion, nine hundred sixty-six billion, nine hundred thirty-eight million, four hundred eighty-nine thousand, four hundred eighty-nine".