6740134640 has 80 divisors (see below), whose sum is σ = 16207534080. Its totient is φ = 2605175040.

The previous prime is 6740134601. The next prime is 6740134649. The reversal of 6740134640 is 464310476.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 6740134640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6740134649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285695 + ... + 308385.

It is an arithmetic number, because the mean of its divisors is an integer number (202594176).

Almost surely, 2^6740134640 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 6740134640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8103767040).

6740134640 is an abundant number, since it is smaller than the sum of its proper divisors (9467399440).

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

6740134640 is a wasteful number, since it uses less digits than its factorization.

6740134640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22830 (or 22824 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 6740134640 is about 82098.3230035791. The cubic root of 6740134640 is about 1888.9604166890.

The spelling of 6740134640 in words is "six billion, seven hundred forty million, one hundred thirty-four thousand, six hundred forty".