86221861777843 has 4 divisors (see below), whose sum is σ = 94060212848568. Its totient is φ = 78383510707120.

The previous prime is 86221861777769. The next prime is 86221861777873. The reversal of 86221861777843 is 34877716812268.

It is a happy number.

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-86221861777843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86221861777873) 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, 3919175535346 + ... + 3919175535367.

It is an arithmetic number, because the mean of its divisors is an integer number (23515053212142).

Almost surely, 2^{86221861777843} is an apocalyptic number.

86221861777843 is a deficient number, since it is larger than the sum of its proper divisors (7838351070725).

86221861777843 is a wasteful number, since it uses less digits than its factorization.

86221861777843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838351070724.

The product of its digits is 303464448, while the sum is 70.

The spelling of 86221861777843 in words is "eighty-six trillion, two hundred twenty-one billion, eight hundred sixty-one million, seven hundred seventy-seven thousand, eight hundred forty-three".