8219639612 has 12 divisors (see below), whose sum is σ = 14586966576. Its totient is φ = 4051934880.

The previous prime is 8219639611. The next prime is 8219639639. The reversal of 8219639612 is 2169369128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8219639611) 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, 14470913 + ... + 14471480.

It is an arithmetic number, because the mean of its divisors is an integer number (1215580548).

Almost surely, 2^8219639612 is an apocalyptic number.

It is an amenable number.

8219639612 is a deficient number, since it is larger than the sum of its proper divisors (6367326964).

8219639612 is a wasteful number, since it uses less digits than its factorization.

8219639612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28942468 (or 28942466 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 8219639612 is about 90662.2281438086. The cubic root of 8219639612 is about 2018.1383046630.

The spelling of 8219639612 in words is "eight billion, two hundred nineteen million, six hundred thirty-nine thousand, six hundred twelve".