6978820992 has 256 divisors, whose sum is σ = 22927968000. Its totient is φ = 1849098240.

The previous prime is 6978820957. The next prime is 6978820999. The reversal of 6978820992 is 2990288796.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6978820999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1039984 + ... + 1046672.

It is an arithmetic number, because the mean of its divisors is an integer number (89562375).

Almost surely, 2^6978820992 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 6978820992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11463984000).

6978820992 is an abundant number, since it is smaller than the sum of its proper divisors (15949147008).

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

6978820992 is a wasteful number, since it uses less digits than its factorization.

6978820992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749 (or 6737 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The square root of 6978820992 is about 83539.3379911524. The cubic root of 6978820992 is about 1910.9999964402. Note that the first 5 decimals are identical.

The spelling of 6978820992 in words is "six billion, nine hundred seventy-eight million, eight hundred twenty thousand, nine hundred ninety-two".