6803521656 has 32 divisors (see below), whose sum is σ = 17013051600. Its totient is φ = 2267274240.

The previous prime is 6803521643. The next prime is 6803521657. The reversal of 6803521656 is 6561253086.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6803521657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69000 + ... + 135528.

Almost surely, 2^6803521656 is an apocalyptic number.

It is an amenable number.

6803521656 is an abundant number, since it is smaller than the sum of its proper divisors (10209529944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6803521656 is a wasteful number, since it uses less digits than its factorization.

6803521656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70799 (or 70795 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 6803521656 is about 82483.4629243947. The cubic root of 6803521656 is about 1894.8634721317.

The spelling of 6803521656 in words is "six billion, eight hundred three million, five hundred twenty-one thousand, six hundred fifty-six".