6543621422 has 64 divisors (see below), whose sum is σ = 11449589760. Its totient is φ = 2781475200.

The previous prime is 6543621379. The next prime is 6543621437. The reversal of 6543621422 is 2241263456.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1657583 + ... + 1661525.

It is an arithmetic number, because the mean of its divisors is an integer number (178899840).

Almost surely, 2^6543621422 is an apocalyptic number.

6543621422 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6543621422 is a deficient number, since it is larger than the sum of its proper divisors (4905968338).

6543621422 is a wasteful number, since it uses less digits than its factorization.

6543621422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089.

The product of its digits is 69120, while the sum is 35.

The square root of 6543621422 is about 80892.6536961175. The cubic root of 6543621422 is about 1870.4210803115.

Adding to 6543621422 its reverse (2241263456), we get a palindrome (8784884878).

The spelling of 6543621422 in words is "six billion, five hundred forty-three million, six hundred twenty-one thousand, four hundred twenty-two".