86278524806585 has 4 divisors (see below), whose sum is σ = 103534229767908. Its totient is φ = 69022819845264.

The previous prime is 86278524806581. The next prime is 86278524806597. The reversal of 86278524806585 is 58560842587268.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11561448445369 + 74717076361216 = 3400213^2 + 8643904^2 .

It is a cyclic number.

It is not a de Polignac number, because 86278524806585 - 2² = 86278524806581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86278524806581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8627852480654 + ... + 8627852480663.

It is an arithmetic number, because the mean of its divisors is an integer number (25883557441977).

Almost surely, 2^{86278524806585} is an apocalyptic number.

It is an amenable number.

86278524806585 is a deficient number, since it is larger than the sum of its proper divisors (17255704961323).

86278524806585 is a wasteful number, since it uses less digits than its factorization.

86278524806585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17255704961322.

The product of its (nonzero) digits is 2064384000, while the sum is 74.

The spelling of 86278524806585 in words is "eighty-six trillion, two hundred seventy-eight billion, five hundred twenty-four million, eight hundred six thousand, five hundred eighty-five".