86136582181 has 4 divisors (see below), whose sum is σ = 92762473132. Its totient is φ = 79510691232.

The previous prime is 86136582167. The next prime is 86136582223. The reversal of 86136582181 is 18128563168.

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 19358269956 + 66778312225 = 139134^2 + 258415^2 .

It is a cyclic number.

It is not a de Polignac number, because 86136582181 - 2¹³ = 86136573989 is a prime.

It is a super-2 number, since 2×86136582181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86136582881) 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, 3312945456 + ... + 3312945481.

It is an arithmetic number, because the mean of its divisors is an integer number (23190618283).

Almost surely, 2^86136582181 is an apocalyptic number.

It is an amenable number.

86136582181 is a deficient number, since it is larger than the sum of its proper divisors (6625890951).

86136582181 is a wasteful number, since it uses less digits than its factorization.

86136582181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6625890950.

The product of its digits is 552960, while the sum is 49.

The spelling of 86136582181 in words is "eighty-six billion, one hundred thirty-six million, five hundred eighty-two thousand, one hundred eighty-one".