8121747676991 has 8 divisors (see below), whose sum is σ = 9126779998560. Its totient is φ = 7171041426912.

The previous prime is 8121747676951. The next prime is 8121747676993. The reversal of 8121747676991 is 1996767471218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8121747676991 - 2²² = 8121743482687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121747676993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13581517556 + ... + 13581518153.

It is an arithmetic number, because the mean of its divisors is an integer number (1140847499820).

Almost surely, 2^{8121747676991} is an apocalyptic number.

8121747676991 is a deficient number, since it is larger than the sum of its proper divisors (1005032321569).

8121747676991 is a wasteful number, since it uses less digits than its factorization.

8121747676991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27163035745.

The product of its digits is 64012032, while the sum is 68.

The spelling of 8121747676991 in words is "eight trillion, one hundred twenty-one billion, seven hundred forty-seven million, six hundred seventy-six thousand, nine hundred ninety-one".