86656394881 has 16 divisors (see below), whose sum is σ = 104871072384. Its totient is φ = 69901311744.

The previous prime is 86656394879. The next prime is 86656394897. The reversal of 86656394881 is 18849365668.

It is a cyclic number.

It is not a de Polignac number, because 86656394881 - 2¹ = 86656394879 is a prime.

It is a super-2 number, since 2×86656394881² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86656394581) 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 15 ways as a sum of consecutive naturals, for example, 1625851 + ... + 1678303.

It is an arithmetic number, because the mean of its divisors is an integer number (6554442024).

Almost surely, 2^86656394881 is an apocalyptic number.

It is an amenable number.

86656394881 is a deficient number, since it is larger than the sum of its proper divisors (18214677503).

86656394881 is a wasteful number, since it uses less digits than its factorization.

86656394881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66360.

The product of its digits is 59719680, while the sum is 64.

The spelling of 86656394881 in words is "eighty-six billion, six hundred fifty-six million, three hundred ninety-four thousand, eight hundred eighty-one".