86127128691 has 4 divisors (see below), whose sum is σ = 114836171592. Its totient is φ = 57418085792.

The previous prime is 86127128599. The next prime is 86127128699. The reversal of 86127128691 is 19682172168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86127128691 - 2⁹ = 86127128179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86127128699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14354521446 + ... + 14354521451.

It is an arithmetic number, because the mean of its divisors is an integer number (28709042898).

Almost surely, 2^86127128691 is an apocalyptic number.

86127128691 is a deficient number, since it is larger than the sum of its proper divisors (28709042901).

86127128691 is a wasteful number, since it uses less digits than its factorization.

86127128691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28709042900.

The product of its digits is 580608, while the sum is 51.

The spelling of 86127128691 in words is "eighty-six billion, one hundred twenty-seven million, one hundred twenty-eight thousand, six hundred ninety-one".