86985658691 has 4 divisors (see below), whose sum is σ = 87162819384. Its totient is φ = 86808498000.

The previous prime is 86985658687. The next prime is 86985658729. The reversal of 86985658691 is 19685658968.

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 86985658691 - 2² = 86985658687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86985658651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88579610 + ... + 88580591.

It is an arithmetic number, because the mean of its divisors is an integer number (21790704846).

Almost surely, 2^86985658691 is an apocalyptic number.

86985658691 is a deficient number, since it is larger than the sum of its proper divisors (177160693).

86985658691 is a wasteful number, since it uses less digits than its factorization.

86985658691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177160692.

The product of its digits is 223948800, while the sum is 71.

The spelling of 86985658691 in words is "eighty-six billion, nine hundred eighty-five million, six hundred fifty-eight thousand, six hundred ninety-one".