86138205871 has 4 divisors (see below), whose sum is σ = 86148514152. Its totient is φ = 86127897592.

The previous prime is 86138205859. The next prime is 86138205887. The reversal of 86138205871 is 17850283168.

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

It is a cyclic number.

It is not a de Polignac number, because 86138205871 - 2¹³ = 86138197679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86108205871) 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, 5141596 + ... + 5158321.

It is an arithmetic number, because the mean of its divisors is an integer number (21537128538).

Almost surely, 2^86138205871 is an apocalyptic number.

86138205871 is a deficient number, since it is larger than the sum of its proper divisors (10308281).

86138205871 is a wasteful number, since it uses less digits than its factorization.

86138205871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10308280.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 86138205871 in words is "eighty-six billion, one hundred thirty-eight million, two hundred five thousand, eight hundred seventy-one".