3011721856 has 128 divisors (see below), whose sum is σ = 7240988160. Its totient is φ = 1229230080.

The previous prime is 3011721841. The next prime is 3011721859. The reversal of 3011721856 is 6581271103.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (3011721859) 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 15 ways as a sum of consecutive naturals, for example, 675025 + ... + 679471.

It is an arithmetic number, because the mean of its divisors is an integer number (56570220).

Almost surely, 2^3011721856 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 3011721856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3620494080).

3011721856 is an abundant number, since it is smaller than the sum of its proper divisors (4229266304).

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

3011721856 is a wasteful number, since it uses less digits than its factorization.

3011721856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4522 (or 4510 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 3011721856 is about 54879.1568448350. The cubic root of 3011721856 is about 1444.1255559521.

Adding to 3011721856 its reverse (6581271103), we get a palindrome (9592992959).

The spelling of 3011721856 in words is "three billion, eleven million, seven hundred twenty-one thousand, eight hundred fifty-six".