86510348581 has 2 divisors, whose sum is σ = 86510348582. Its totient is φ = 86510348580.

The previous prime is 86510348563. The next prime is 86510348593. The reversal of 86510348581 is 18584301568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54086944356 + 32423404225 = 232566^2 + 180065^2 .

It is a cyclic number.

It is not a de Polignac number, because 86510348581 - 2⁵ = 86510348549 is a prime.

It is a super-2 number, since 2×86510348581² (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 (86510348501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43255174290 + 43255174291.

It is an arithmetic number, because the mean of its divisors is an integer number (43255174291).

Almost surely, 2^86510348581 is an apocalyptic number.

It is an amenable number.

86510348581 is a deficient number, since it is larger than the sum of its proper divisors (1).

86510348581 is an equidigital number, since it uses as much as digits as its factorization.

86510348581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 86510348581 in words is "eighty-six billion, five hundred ten million, three hundred forty-eight thousand, five hundred eighty-one".