86688109091 has 16 divisors (see below), whose sum is σ = 91061228544. Its totient is φ = 82440820224.

The previous prime is 86688109073. The next prime is 86688109139. The reversal of 86688109091 is 19090188668.

It is a cyclic number.

It is not a de Polignac number, because 86688109091 - 2²⁶ = 86621000227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86688109021) 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, 278930 + ... + 501176.

It is an arithmetic number, because the mean of its divisors is an integer number (5691326784).

Almost surely, 2^86688109091 is an apocalyptic number.

86688109091 is a deficient number, since it is larger than the sum of its proper divisors (4373119453).

86688109091 is a wasteful number, since it uses less digits than its factorization.

86688109091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222530.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 86688109091 in words is "eighty-six billion, six hundred eighty-eight million, one hundred nine thousand, ninety-one".