6821433512 has 8 divisors (see below), whose sum is σ = 12790187850. Its totient is φ = 3410716752.

The previous prime is 6821433511. The next prime is 6821433571. The reversal of 6821433512 is 2153341286.

It can be written as a sum of positive squares in only one way, i.e., 4169801476 + 2651632036 = 64574^2 + 51494^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6821433511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426339587 + ... + 426339602.

Almost surely, 2^6821433512 is an apocalyptic number.

It is an amenable number.

6821433512 is a deficient number, since it is larger than the sum of its proper divisors (5968754338).

6821433512 is a wasteful number, since it uses less digits than its factorization.

6821433512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852679195 (or 852679191 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 6821433512 is about 82591.9700213041. The cubic root of 6821433512 is about 1896.5249048137.

Adding to 6821433512 its reverse (2153341286), we get a palindrome (8974774798).

The spelling of 6821433512 in words is "six billion, eight hundred twenty-one million, four hundred thirty-three thousand, five hundred twelve".