8709686007891 has 32 divisors (see below), whose sum is σ = 12938545152000. Its totient is φ = 5166141029280.

The previous prime is 8709686007853. The next prime is 8709686007943. The reversal of 8709686007891 is 1987006869078.

It is not a de Polignac number, because 8709686007891 - 2¹⁴ = 8709685991507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8709686007791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82614070 + ... + 82719428.

It is an arithmetic number, because the mean of its divisors is an integer number (404329536000).

Almost surely, 2^{8709686007891} is an apocalyptic number.

8709686007891 is a deficient number, since it is larger than the sum of its proper divisors (4228859144109).

8709686007891 is a wasteful number, since it uses less digits than its factorization.

8709686007891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158719.

The product of its (nonzero) digits is 73156608, while the sum is 69.

The spelling of 8709686007891 in words is "eight trillion, seven hundred nine billion, six hundred eighty-six million, seven thousand, eight hundred ninety-one".