27973971768 has 16 divisors (see below), whose sum is σ = 69934929480. Its totient is φ = 9324657248.

The previous prime is 27973971763. The next prime is 27973971791. The reversal of 27973971768 is 86717937972.

It is a super-2 number, since 2×27973971768² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27973971699 and 27973971708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27973971763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582791055 + ... + 582791102.

Almost surely, 2^27973971768 is an apocalyptic number.

It is an amenable number.

27973971768 is an abundant number, since it is smaller than the sum of its proper divisors (41960957712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27973971768 is a wasteful number, since it uses less digits than its factorization.

27973971768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165582166 (or 1165582162 counting only the distinct ones).

The product of its digits is 56010528, while the sum is 66.

The spelling of 27973971768 in words is "twenty-seven billion, nine hundred seventy-three million, nine hundred seventy-one thousand, seven hundred sixty-eight".