9678657866512 has 40 divisors (see below), whose sum is σ = 18928952371296. Its totient is φ = 4793773130496.

The previous prime is 9678657866489. The next prime is 9678657866513. The reversal of 9678657866512 is 2156687568769.

It is a super-2 number, since 2×9678657866512² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9678657866513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25824363 + ... + 26196469.

Almost surely, 2^{9678657866512} is an apocalyptic number.

It is an amenable number.

9678657866512 is a deficient number, since it is larger than the sum of its proper divisors (9250294504784).

9678657866512 is a wasteful number, since it uses less digits than its factorization.

9678657866512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387415 (or 387409 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 76.

The spelling of 9678657866512 in words is "nine trillion, six hundred seventy-eight billion, six hundred fifty-seven million, eight hundred sixty-six thousand, five hundred twelve".