6543163220 has 24 divisors (see below), whose sum is σ = 14989792608. Its totient is φ = 2379332000.

The previous prime is 6543163217. The next prime is 6543163261. The reversal of 6543163220 is 223613456.

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, 14870606 + ... + 14871045.

It is an arithmetic number, because the mean of its divisors is an integer number (624574692).

Almost surely, 2^6543163220 is an apocalyptic number.

It is an amenable number.

6543163220 is an abundant number, since it is smaller than the sum of its proper divisors (8446629388).

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

6543163220 is a wasteful number, since it uses less digits than its factorization.

6543163220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29741671 (or 29741669 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 6543163220 is about 80889.8214857716. The cubic root of 6543163220 is about 1870.3774219849.

Adding to 6543163220 its reverse (223613456), we get a palindrome (6766776676).

The spelling of 6543163220 in words is "six billion, five hundred forty-three million, one hundred sixty-three thousand, two hundred twenty".