6553943844 has 96 divisors (see below), whose sum is σ = 17875200000. Its totient is φ = 1868217120.

The previous prime is 6553943843. The next prime is 6553943867. The reversal of 6553943844 is 4483493556.

It is not an unprimeable number, because it can be changed into a prime (6553943843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2052289 + ... + 2055479.

It is an arithmetic number, because the mean of its divisors is an integer number (186200000).

Almost surely, 2^6553943844 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 6553943844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8937600000).

6553943844 is an abundant number, since it is smaller than the sum of its proper divisors (11321256156).

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

6553943844 is a wasteful number, since it uses less digits than its factorization.

6553943844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718 (or 3702 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 51.

The square root of 6553943844 is about 80956.4317642521. The cubic root of 6553943844 is about 1871.4040799423.

The spelling of 6553943844 in words is "six billion, five hundred fifty-three million, nine hundred forty-three thousand, eight hundred forty-four".