6821747712 has 264 divisors, whose sum is σ = 21468051696. Its totient is φ = 2073821184.

The previous prime is 6821747651. The next prime is 6821747741. The reversal of 6821747712 is 2177471286.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11621083 + ... + 11621669.

Almost surely, 2^6821747712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6821747712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10734025848).

6821747712 is an abundant number, since it is smaller than the sum of its proper divisors (14646303984).

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

6821747712 is a wasteful number, since it uses less digits than its factorization.

6821747712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 702 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 6821747712 is about 82593.8721213626. The cubic root of 6821747712 is about 1896.5540227880.

The spelling of 6821747712 in words is "six billion, eight hundred twenty-one million, seven hundred forty-seven thousand, seven hundred twelve".