86182144981 has 2 divisors, whose sum is σ = 86182144982. Its totient is φ = 86182144980.

The previous prime is 86182144943. The next prime is 86182145081. The reversal of 86182144981 is 18944128168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45381780900 + 40800364081 = 213030^2 + 201991^2 .

It is a cyclic number.

It is not a de Polignac number, because 86182144981 - 2¹⁵ = 86182112213 is a prime.

It is a super-2 number, since 2×86182144981² (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 (86182144931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43091072490 + 43091072491.

It is an arithmetic number, because the mean of its divisors is an integer number (43091072491).

Almost surely, 2^86182144981 is an apocalyptic number.

It is an amenable number.

86182144981 is a deficient number, since it is larger than the sum of its proper divisors (1).

86182144981 is an equidigital number, since it uses as much as digits as its factorization.

86182144981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 884736, while the sum is 52.

The spelling of 86182144981 in words is "eighty-six billion, one hundred eighty-two million, one hundred forty-four thousand, nine hundred eighty-one".