6543454542 has 16 divisors (see below), whose sum is σ = 13090155600. Its totient is φ = 2180610432.

The previous prime is 6543454439. The next prime is 6543454543. The reversal of 6543454542 is 2454543456.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6543454494 and 6543454503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543454543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108667 + ... + 157782.

It is an arithmetic number, because the mean of its divisors is an integer number (818134725).

Almost surely, 2^6543454542 is an apocalyptic number.

6543454542 is an abundant number, since it is smaller than the sum of its proper divisors (6546701058).

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

6543454542 is a wasteful number, since it uses less digits than its factorization.

6543454542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270547.

The product of its digits is 1152000, while the sum is 42.

The square root of 6543454542 is about 80891.6221990881. The cubic root of 6543454542 is about 1870.4051799151.

Adding to 6543454542 its reverse (2454543456), we get a palindrome (8997997998).

The spelling of 6543454542 in words is "six billion, five hundred forty-three million, four hundred fifty-four thousand, five hundred forty-two".