8539779791668 has 12 divisors (see below), whose sum is σ = 14969563912800. Its totient is φ = 4262761530872.

The previous prime is 8539779791657. The next prime is 8539779791701. The reversal of 8539779791668 is 8661979779358.

It is a super-2 number, since 2×8539779791668² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1782088546 + ... + 1782093337.

It is an arithmetic number, because the mean of its divisors is an integer number (1247463659400).

Almost surely, 2^{8539779791668} is an apocalyptic number.

It is an amenable number.

8539779791668 is a deficient number, since it is larger than the sum of its proper divisors (6429784121132).

8539779791668 is a wasteful number, since it uses less digits than its factorization.

8539779791668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564182486 (or 3564182484 counting only the distinct ones).

The product of its digits is 8641624320, while the sum is 85.

The spelling of 8539779791668 in words is "eight trillion, five hundred thirty-nine billion, seven hundred seventy-nine million, seven hundred ninety-one thousand, six hundred sixty-eight".