6745681530 has 480 divisors, whose sum is σ = 22651799040. Its totient is φ = 1386927360.

The previous prime is 6745681507. The next prime is 6745681541. The reversal of 6745681530 is 351865476.

6745681530 is a `hidden beast` number, since 6 + 74 + 568 + 15 + 3 + 0 = 666.

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

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 127276984 + ... + 127277036.

It is an arithmetic number, because the mean of its divisors is an integer number (47191248).

Almost surely, 2^6745681530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6745681530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11325899520).

6745681530 is an abundant number, since it is smaller than the sum of its proper divisors (15906117510).

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

6745681530 is a wasteful number, since it uses less digits than its factorization.

6745681530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 6745681530 is about 82132.0980494228. The cubic root of 6745681530 is about 1889.4784569171.

The spelling of 6745681530 in words is "six billion, seven hundred forty-five million, six hundred eighty-one thousand, five hundred thirty".