6544020020 has 24 divisors (see below), whose sum is σ = 14185747968. Its totient is φ = 2533168800.

The previous prime is 6544020011. The next prime is 6544020061. The reversal of 6544020020 is 200204456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5276816 + ... + 5278055.

It is an arithmetic number, because the mean of its divisors is an integer number (591072832).

Almost surely, 2^6544020020 is an apocalyptic number.

It is an amenable number.

6544020020 is an abundant number, since it is smaller than the sum of its proper divisors (7641727948).

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

6544020020 is a wasteful number, since it uses less digits than its factorization.

6544020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10554911 (or 10554909 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 6544020020 is about 80895.1174051933. The cubic root of 6544020020 is about 1870.4590578022.

Adding to 6544020020 its reverse (200204456), we get a palindrome (6744224476).

The spelling of 6544020020 in words is "six billion, five hundred forty-four million, twenty thousand, twenty".