8219326784 has 14 divisors (see below), whose sum is σ = 16310226714. Its totient is φ = 4109663360.

The previous prime is 8219326781. The next prime is 8219326799. The reversal of 8219326784 is 4876239128.

It can be written as a sum of positive squares in only one way, i.e., 8215609600 + 3717184 = 90640^2 + 1928^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219326781) 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 as a sum of consecutive naturals, namely, 64213427 + ... + 64213554.

Almost surely, 2^8219326784 is an apocalyptic number.

It is an amenable number.

8219326784 is a deficient number, since it is larger than the sum of its proper divisors (8090899930).

8219326784 is a wasteful number, since it uses less digits than its factorization.

8219326784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128426993 (or 128426983 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The square root of 8219326784 is about 90660.5028885236. The cubic root of 8219326784 is about 2018.1127018301.

The spelling of 8219326784 in words is "eight billion, two hundred nineteen million, three hundred twenty-six thousand, seven hundred eighty-four".