86681631189 has 4 divisors (see below), whose sum is σ = 115575508256. Its totient is φ = 57787754124.

The previous prime is 86681631187. The next prime is 86681631209. The reversal of 86681631189 is 98113618668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 86681631189 - 2¹ = 86681631187 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 (86681631187) 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, 14446938529 + ... + 14446938534.

It is an arithmetic number, because the mean of its divisors is an integer number (28893877064).

Almost surely, 2^86681631189 is an apocalyptic number.

It is an amenable number.

86681631189 is a deficient number, since it is larger than the sum of its proper divisors (28893877067).

86681631189 is a wasteful number, since it uses less digits than its factorization.

86681631189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28893877066.

The product of its digits is 2985984, while the sum is 57.

The spelling of 86681631189 in words is "eighty-six billion, six hundred eighty-one million, six hundred thirty-one thousand, one hundred eighty-nine".