86623328521 has 16 divisors (see below), whose sum is σ = 94034981376. Its totient is φ = 79482535936.

The previous prime is 86623328503. The next prime is 86623328527. The reversal of 86623328521 is 12582332668.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86623328521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86623328527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5581 + ... + 416266.

It is an arithmetic number, because the mean of its divisors is an integer number (5877186336).

Almost surely, 2^86623328521 is an apocalyptic number.

It is an amenable number.

86623328521 is a deficient number, since it is larger than the sum of its proper divisors (7411652855).

86623328521 is a wasteful number, since it uses less digits than its factorization.

86623328521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422168.

The product of its digits is 829440, while the sum is 46.

The spelling of 86623328521 in words is "eighty-six billion, six hundred twenty-three million, three hundred twenty-eight thousand, five hundred twenty-one".