6717640544 has 48 divisors (see below), whose sum is σ = 13822679808. Its totient is φ = 3207591552.

The previous prime is 6717640543. The next prime is 6717640603. The reversal of 6717640544 is 4450467176.

It is a junction number, because it is equal to n+sod(n) for n = 6717640495 and 6717640504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6717640543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469139 + ... + 483245.

It is an arithmetic number, because the mean of its divisors is an integer number (287972496).

Almost surely, 2^6717640544 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 6717640544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6911339904).

6717640544 is an abundant number, since it is smaller than the sum of its proper divisors (7105039264).

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

6717640544 is a wasteful number, since it uses less digits than its factorization.

6717640544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14787 (or 14779 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The square root of 6717640544 is about 81961.2136562167. The cubic root of 6717640544 is about 1886.8567093017.

The spelling of 6717640544 in words is "six billion, seven hundred seventeen million, six hundred forty thousand, five hundred forty-four".