8681555406812 has 24 divisors (see below), whose sum is σ = 15484613036256. Its totient is φ = 4257435660608.

The previous prime is 8681555406761. The next prime is 8681555406893. The reversal of 8681555406812 is 2186045551868.

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, 6297488 + ... + 7551255.

It is an arithmetic number, because the mean of its divisors is an integer number (645192209844).

Almost surely, 2^{8681555406812} is an apocalyptic number.

It is an amenable number.

8681555406812 is a deficient number, since it is larger than the sum of its proper divisors (6803057629444).

8681555406812 is a wasteful number, since it uses less digits than its factorization.

8681555406812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13851757 (or 13851755 counting only the distinct ones).

The product of its (nonzero) digits is 18432000, while the sum is 59.

The spelling of 8681555406812 in words is "eight trillion, six hundred eighty-one billion, five hundred fifty-five million, four hundred six thousand, eight hundred twelve".