9678657106191 has 16 divisors (see below), whose sum is σ = 14022276285440. Its totient is φ = 5915647805760.

The previous prime is 9678657106189. The next prime is 9678657106231. The reversal of 9678657106191 is 1916017568769.

It is not a de Polignac number, because 9678657106191 - 2¹ = 9678657106189 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9678657106171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2738724070 + ... + 2738727603.

It is an arithmetic number, because the mean of its divisors is an integer number (876392267840).

Almost surely, 2^{9678657106191} is an apocalyptic number.

9678657106191 is a deficient number, since it is larger than the sum of its proper divisors (4343619179249).

9678657106191 is a wasteful number, since it uses less digits than its factorization.

9678657106191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477451726.

The product of its (nonzero) digits is 34292160, while the sum is 66.

The spelling of 9678657106191 in words is "nine trillion, six hundred seventy-eight billion, six hundred fifty-seven million, one hundred six thousand, one hundred ninety-one".