86635956689 has 4 divisors (see below), whose sum is σ = 86636698224. Its totient is φ = 86635215156.

The previous prime is 86635956683. The next prime is 86635956697. The reversal of 86635956689 is 98665953668.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 86635956689 - 2¹² = 86635952593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86635956683) 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, 152807 + ... + 443420.

It is an arithmetic number, because the mean of its divisors is an integer number (21659174556).

Almost surely, 2^86635956689 is an apocalyptic number.

It is an amenable number.

86635956689 is a deficient number, since it is larger than the sum of its proper divisors (741535).

86635956689 is a wasteful number, since it uses less digits than its factorization.

86635956689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741534.

The product of its digits is 503884800, while the sum is 71.

The spelling of 86635956689 in words is "eighty-six billion, six hundred thirty-five million, nine hundred fifty-six thousand, six hundred eighty-nine".