8684978139892 has 24 divisors (see below), whose sum is σ = 15610140862344. Its totient is φ = 4224947715072.

The previous prime is 8684978139829. The next prime is 8684978139911. The reversal of 8684978139892 is 2989318794868.

It can be written as a sum of positive squares in 4 ways, for example, as 1768782961936 + 6916195177956 = 1329956^2 + 2629866^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356668 + ... + 4787884.

It is an arithmetic number, because the mean of its divisors is an integer number (650422535931).

Almost surely, 2^{8684978139892} is an apocalyptic number.

It is an amenable number.

8684978139892 is a deficient number, since it is larger than the sum of its proper divisors (6925162722452).

8684978139892 is a wasteful number, since it uses less digits than its factorization.

8684978139892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455395 (or 2455393 counting only the distinct ones).

The product of its digits is 3009871872, while the sum is 82.

The spelling of 8684978139892 in words is "eight trillion, six hundred eighty-four billion, nine hundred seventy-eight million, one hundred thirty-nine thousand, eight hundred ninety-two".