86171994881 has 8 divisors (see below), whose sum is σ = 98492917824. Its totient is φ = 73853731440.

The previous prime is 86171994809. The next prime is 86171994889. The reversal of 86171994881 is 18849917168.

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-86171994881 is a prime.

It is a super-2 number, since 2×86171994881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (86171994889) 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, 594950 + ... + 725471.

It is an arithmetic number, because the mean of its divisors is an integer number (12311614728).

Almost surely, 2^86171994881 is an apocalyptic number.

It is an amenable number.

86171994881 is a deficient number, since it is larger than the sum of its proper divisors (12320922943).

86171994881 is a wasteful number, since it uses less digits than its factorization.

86171994881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329751.

The product of its digits is 6967296, while the sum is 62.

The spelling of 86171994881 in words is "eighty-six billion, one hundred seventy-one million, nine hundred ninety-four thousand, eight hundred eighty-one".