86178699687181 has 2 divisors, whose sum is σ = 86178699687182. Its totient is φ = 86178699687180.

The previous prime is 86178699687161. The next prime is 86178699687193. The reversal of 86178699687181 is 18178699687168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63261741375625 + 22916958311556 = 7953725^2 + 4787166^2 .

It is a cyclic number.

It is not a de Polignac number, because 86178699687181 - 2¹⁹ = 86178699162893 is a prime.

It is a super-2 number, since 2×86178699687181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86178699687161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43089349843590 + 43089349843591.

It is an arithmetic number, because the mean of its divisors is an integer number (43089349843591).

Almost surely, 2^{86178699687181} is an apocalyptic number.

It is an amenable number.

86178699687181 is a deficient number, since it is larger than the sum of its proper divisors (1).

86178699687181 is an equidigital number, since it uses as much as digits as its factorization.

86178699687181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3511517184, while the sum is 85.

The spelling of 86178699687181 in words is "eighty-six trillion, one hundred seventy-eight billion, six hundred ninety-nine million, six hundred eighty-seven thousand, one hundred eighty-one".