6745756815 has 32 divisors (see below), whose sum is σ = 13705666560. Its totient is φ = 3083774112.

The previous prime is 6745756813. The next prime is 6745756883. The reversal of 6745756815 is 5186575476.

It is a happy number.

6745756815 is a `hidden beast` number, since 6 + 7 + 4 + 575 + 68 + 1 + 5 = 666.

It is not a de Polignac number, because 6745756815 - 2¹ = 6745756813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745756813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3568239 + ... + 3570128.

It is an arithmetic number, because the mean of its divisors is an integer number (428302080).

Almost surely, 2^6745756815 is an apocalyptic number.

6745756815 is an abundant number, since it is smaller than the sum of its proper divisors (6959909745).

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

6745756815 is a wasteful number, since it uses less digits than its factorization.

6745756815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138388 (or 7138382 counting only the distinct ones).

The product of its digits is 7056000, while the sum is 54.

The square root of 6745756815 is about 82132.5563646962. The cubic root of 6745756815 is about 1889.4854860491.

The spelling of 6745756815 in words is "six billion, seven hundred forty-five million, seven hundred fifty-six thousand, eight hundred fifteen".