86317507081 has 4 divisors (see below), whose sum is σ = 92957315332. Its totient is φ = 79677698832.

The previous prime is 86317507061. The next prime is 86317507099. The reversal of 86317507081 is 18070571368.

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 12474879481 + 73842627600 = 111691^2 + 271740^2 .

It is a cyclic number.

It is not a de Polignac number, because 86317507081 - 2¹³ = 86317498889 is a prime.

It is a super-2 number, since 2×86317507081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86317507051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3319904106 + ... + 3319904131.

It is an arithmetic number, because the mean of its divisors is an integer number (23239328833).

Almost surely, 2^86317507081 is an apocalyptic number.

It is an amenable number.

86317507081 is a deficient number, since it is larger than the sum of its proper divisors (6639808251).

86317507081 is a wasteful number, since it uses less digits than its factorization.

86317507081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639808250.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 86317507081 in words is "eighty-six billion, three hundred seventeen million, five hundred seven thousand, eighty-one".