6821439437472 has 384 divisors, whose sum is σ = 21322567526400. Its totient is φ = 1886221209600.

The previous prime is 6821439437471. The next prime is 6821439437503. The reversal of 6821439437472 is 2747349341286.

It is not an unprimeable number, because it can be changed into a prime (6821439437471) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 244947453 + ... + 244975299.

It is an arithmetic number, because the mean of its divisors is an integer number (55527519600).

Almost surely, 2^{6821439437472} 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 6821439437472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10661283763200).

6821439437472 is an abundant number, since it is smaller than the sum of its proper divisors (14501128088928).

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

6821439437472 is a wasteful number, since it uses less digits than its factorization.

6821439437472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28340 (or 28332 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 60.

The spelling of 6821439437472 in words is "six trillion, eight hundred twenty-one billion, four hundred thirty-nine million, four hundred thirty-seven thousand, four hundred seventy-two".