86844171531 has 8 divisors (see below), whose sum is σ = 124699323280. Its totient is φ = 53442567072.

The previous prime is 86844171503. The next prime is 86844171541. The reversal of 86844171531 is 13517144868.

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

It is not a de Polignac number, because 86844171531 - 2⁶ = 86844171467 is a prime.

It is a super-2 number, since 2×86844171531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86844171541) 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, 1113386776 + ... + 1113386853.

It is an arithmetic number, because the mean of its divisors is an integer number (15587415410).

Almost surely, 2^86844171531 is an apocalyptic number.

86844171531 is a deficient number, since it is larger than the sum of its proper divisors (37855151749).

86844171531 is a wasteful number, since it uses less digits than its factorization.

86844171531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226773645.

The product of its digits is 645120, while the sum is 48.

The spelling of 86844171531 in words is "eighty-six billion, eight hundred forty-four million, one hundred seventy-one thousand, five hundred thirty-one".