6386748784 has 80 divisors (see below), whose sum is σ = 13978355328. Its totient is φ = 2806880256.

The previous prime is 6386748773. The next prime is 6386748791. The reversal of 6386748784 is 4878476836.

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 15 ways as a sum of consecutive naturals, for example, 352884 + ... + 370540.

Almost surely, 2^6386748784 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 6386748784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6989177664).

6386748784 is an abundant number, since it is smaller than the sum of its proper divisors (7591606544).

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

6386748784 is a wasteful number, since it uses less digits than its factorization.

6386748784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17762 (or 17756 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 61.

The square root of 6386748784 is about 79917.1369857554. The cubic root of 6386748784 is about 1855.3532585485.

The spelling of 6386748784 in words is "six billion, three hundred eighty-six million, seven hundred forty-eight thousand, seven hundred eighty-four".