86171239418 has 16 divisors (see below), whose sum is σ = 141071569056. Its totient is φ = 39150943440.

The previous prime is 86171239417. The next prime is 86171239477. The reversal of 86171239418 is 81493217168.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (86171239417) 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, 840521 + ... + 937452.

It is an arithmetic number, because the mean of its divisors is an integer number (8816973066).

Almost surely, 2^86171239418 is an apocalyptic number.

86171239418 is a deficient number, since it is larger than the sum of its proper divisors (54900329638).

86171239418 is a wasteful number, since it uses less digits than its factorization.

86171239418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780189.

The product of its digits is 580608, while the sum is 50.

The spelling of 86171239418 in words is "eighty-six billion, one hundred seventy-one million, two hundred thirty-nine thousand, four hundred eighteen".