6738318720 has 640 divisors, whose sum is σ = 28435968000. Its totient is φ = 1488015360.

The previous prime is 6738318703. The next prime is 6738318731. The reversal of 6738318720 is 278138376.

It is a tau number, because it is divible by the number of its divisors (640).

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 79 ways as a sum of consecutive naturals, for example, 11248981 + ... + 11249579.

It is an arithmetic number, because the mean of its divisors is an integer number (44431200).

Almost surely, 2^6738318720 is an apocalyptic number.

6738318720 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 6738318720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14217984000).

6738318720 is an abundant number, since it is smaller than the sum of its proper divisors (21697649280).

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

6738318720 is a wasteful number, since it uses less digits than its factorization.

6738318720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 6738318720 is about 82087.2628365692. The cubic root of 6738318720 is about 1888.7907608744.

The spelling of 6738318720 in words is "six billion, seven hundred thirty-eight million, three hundred eighteen thousand, seven hundred twenty".