6218444064 has 96 divisors (see below), whose sum is σ = 18767379456. Its totient is φ = 1766027520.

The previous prime is 6218444041. The next prime is 6218444077. The reversal of 6218444064 is 4604448126.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84519 + ... + 139929.

It is an arithmetic number, because the mean of its divisors is an integer number (195493536).

Almost surely, 2^6218444064 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 6218444064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9383689728).

6218444064 is an abundant number, since it is smaller than the sum of its proper divisors (12548935392).

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

6218444064 is a wasteful number, since it uses less digits than its factorization.

6218444064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55598 (or 55590 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The square root of 6218444064 is about 78857.1116894348. Note that the first 3 decimals coincide. The cubic root of 6218444064 is about 1838.9104355921.

The spelling of 6218444064 in words is "six billion, two hundred eighteen million, four hundred forty-four thousand, sixty-four".