86171995572 has 192 divisors, whose sum is σ = 242231915520. Its totient is φ = 23553939456.

The previous prime is 86171995543. The next prime is 86171995573. The reversal of 86171995572 is 27559917168.

It is a super-2 number, since 2×86171995572² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86171995573) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14256783 + ... + 14262825.

It is an arithmetic number, because the mean of its divisors is an integer number (1261624560).

Almost surely, 2^86171995572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86171995572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121115957760).

86171995572 is an abundant number, since it is smaller than the sum of its proper divisors (156059919948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86171995572 is a wasteful number, since it uses less digits than its factorization.

86171995572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382 (or 6380 counting only the distinct ones).

The product of its digits is 9525600, while the sum is 60.

The spelling of 86171995572 in words is "eighty-six billion, one hundred seventy-one million, nine hundred ninety-five thousand, five hundred seventy-two".