6909822720 has 576 divisors, whose sum is σ = 27373248000. Its totient is φ = 1640300544.

The previous prime is 6909822719. The next prime is 6909822749. The reversal of 6909822720 is 272289096.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11162571 + ... + 11163189.

It is an arithmetic number, because the mean of its divisors is an integer number (47523000).

Almost surely, 2^6909822720 is an apocalyptic number.

6909822720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6909822720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13686624000).

6909822720 is an abundant number, since it is smaller than the sum of its proper divisors (20463425280).

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

6909822720 is a wasteful number, since it uses less digits than its factorization.

6909822720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 6909822720 is about 83125.3434278620. The cubic root of 6909822720 is about 1904.6812288243.

The spelling of 6909822720 in words is "six billion, nine hundred nine million, eight hundred twenty-two thousand, seven hundred twenty".