6543220413 has 4 divisors (see below), whose sum is σ = 8724293888. Its totient is φ = 4362146940.

The previous prime is 6543220379. The next prime is 6543220429. The reversal of 6543220413 is 3140223456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6543220413 - 2⁸ = 6543220157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543220483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1090536733 + ... + 1090536738.

It is an arithmetic number, because the mean of its divisors is an integer number (2181073472).

Almost surely, 2^6543220413 is an apocalyptic number.

It is an amenable number.

6543220413 is a deficient number, since it is larger than the sum of its proper divisors (2181073475).

6543220413 is a wasteful number, since it uses less digits than its factorization.

6543220413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2181073474.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 6543220413 is about 80890.1750090825. The cubic root of 6543220413 is about 1870.3828715501.

Adding to 6543220413 its reverse (3140223456), we get a palindrome (9683443869).

The spelling of 6543220413 in words is "six billion, five hundred forty-three million, two hundred twenty thousand, four hundred thirteen".