86315581187 has 4 divisors (see below), whose sum is σ = 94162452216. Its totient is φ = 78468710160.

The previous prime is 86315581123. The next prime is 86315581207. The reversal of 86315581187 is 78118551368.

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 86315581187 - 2⁶ = 86315581123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86315581987) 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, 3923435498 + ... + 3923435519.

It is an arithmetic number, because the mean of its divisors is an integer number (23540613054).

Almost surely, 2^86315581187 is an apocalyptic number.

86315581187 is a deficient number, since it is larger than the sum of its proper divisors (7846871029).

86315581187 is a wasteful number, since it uses less digits than its factorization.

86315581187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846871028.

The product of its digits is 1612800, while the sum is 53.

The spelling of 86315581187 in words is "eighty-six billion, three hundred fifteen million, five hundred eighty-one thousand, one hundred eighty-seven".