6649347312 has 120 divisors (see below), whose sum is σ = 20044252800. Its totient is φ = 2050925184.

The previous prime is 6649347307. The next prime is 6649347319. The reversal of 6649347312 is 2137439466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649347319) 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 23 ways as a sum of consecutive naturals, for example, 89389 + ... + 145907.

It is an arithmetic number, because the mean of its divisors is an integer number (167035440).

Almost surely, 2^6649347312 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 6649347312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10022126400).

6649347312 is an abundant number, since it is smaller than the sum of its proper divisors (13394905488).

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

6649347312 is a wasteful number, since it uses less digits than its factorization.

6649347312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56595 (or 56586 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 6649347312 is about 81543.5301664087. The cubic root of 6649347312 is about 1880.4408306816.

The spelling of 6649347312 in words is "six billion, six hundred forty-nine million, three hundred forty-seven thousand, three hundred twelve".