86643556304771 has 4 divisors (see below), whose sum is σ = 86643735218712. Its totient is φ = 86643377390832.

The previous prime is 86643556304729. The next prime is 86643556304783. The reversal of 86643556304771 is 17740365534668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86643556304771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 86643556304698 and 86643556304707.

It is not an unprimeable number, because it can be changed into a prime (86643556306771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88728581 + ... + 89699766.

It is an arithmetic number, because the mean of its divisors is an integer number (21660933804678).

Almost surely, 2^{86643556304771} is an apocalyptic number.

86643556304771 is a deficient number, since it is larger than the sum of its proper divisors (178913941).

86643556304771 is a wasteful number, since it uses less digits than its factorization.

86643556304771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178913940.

The product of its (nonzero) digits is 304819200, while the sum is 65.

The spelling of 86643556304771 in words is "eighty-six trillion, six hundred forty-three billion, five hundred fifty-six million, three hundred four thousand, seven hundred seventy-one".