8382221643 has 6 divisors (see below), whose sum is σ = 11176506964. Its totient is φ = 5588042044.

The previous prime is 8382221611. The next prime is 8382221663. The reversal of 8382221643 is 3461222838.

It is not a de Polignac number, because 8382221643 - 2⁵ = 8382221611 is a prime.

It is a super-3 number, since 3×8382221643³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8382221663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132148 + ... + 185006.

Almost surely, 2^8382221643 is an apocalyptic number.

8382221643 is a deficient number, since it is larger than the sum of its proper divisors (2794285321).

8382221643 is an frugal number, since it uses more digits than its factorization.

8382221643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105721 (or 52862 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 8382221643 is about 91554.4736372833. The cubic root of 8382221643 is about 2031.3575850261.

Multiplying 8382221643 by its product of digits (110592), we get a square (927006655942656 = 30446784²).

The spelling of 8382221643 in words is "eight billion, three hundred eighty-two million, two hundred twenty-one thousand, six hundred forty-three".