86171995573 has 2 divisors, whose sum is σ = 86171995574. Its totient is φ = 86171995572.

The previous prime is 86171995543. The next prime is 86171995697. The reversal of 86171995573 is 37559917168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75555166129 + 10616829444 = 274873^2 + 103038^2 .

It is a cyclic number.

It is not a de Polignac number, because 86171995573 - 2⁹ = 86171995061 is a prime.

It is a super-2 number, since 2×86171995573² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86171995543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43085997786 + 43085997787.

It is an arithmetic number, because the mean of its divisors is an integer number (43085997787).

Almost surely, 2^86171995573 is an apocalyptic number.

It is an amenable number.

86171995573 is a deficient number, since it is larger than the sum of its proper divisors (1).

86171995573 is an equidigital number, since it uses as much as digits as its factorization.

86171995573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14288400, while the sum is 61.

The spelling of 86171995573 in words is "eighty-six billion, one hundred seventy-one million, nine hundred ninety-five thousand, five hundred seventy-three".