86181125891 has 8 divisors (see below), whose sum is σ = 100162083840. Its totient is φ = 72617510088.

The previous prime is 86181125867. The next prime is 86181125897. The reversal of 86181125891 is 19852118168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86181125891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86181125897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104335091 + ... + 104335916.

It is an arithmetic number, because the mean of its divisors is an integer number (12520260480).

Almost surely, 2^86181125891 is an apocalyptic number.

86181125891 is a deficient number, since it is larger than the sum of its proper divisors (13980957949).

86181125891 is a wasteful number, since it uses less digits than its factorization.

86181125891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208671073.

The product of its digits is 276480, while the sum is 50.

The spelling of 86181125891 in words is "eighty-six billion, one hundred eighty-one million, one hundred twenty-five thousand, eight hundred ninety-one".