8371120656691 has 16 divisors (see below), whose sum is σ = 9042319896064. Its totient is φ = 7703819311104.

The previous prime is 8371120656643. The next prime is 8371120656761. The reversal of 8371120656691 is 1966560211738.

It is a cyclic number.

It is not a de Polignac number, because 8371120656691 - 2²⁷ = 8370986438963 is a prime.

It is a super-2 number, since 2×8371120656691² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8371120656191) 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, 96062446 + ... + 96149548.

It is an arithmetic number, because the mean of its divisors is an integer number (565144993504).

Almost surely, 2^{8371120656691} is an apocalyptic number.

8371120656691 is a deficient number, since it is larger than the sum of its proper divisors (671199239373).

8371120656691 is a wasteful number, since it uses less digits than its factorization.

8371120656691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109390.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 8371120656691 in words is "eight trillion, three hundred seventy-one billion, one hundred twenty million, six hundred fifty-six thousand, six hundred ninety-one".