6544415563 has 4 divisors (see below), whose sum is σ = 7479332080. Its totient is φ = 5609499048.

The previous prime is 6544415533. The next prime is 6544415569. The reversal of 6544415563 is 3655144456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6544415563 - 2¹³ = 6544407371 is a prime.

It is a super-2 number, since 2×6544415563² = 85658750122473213938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6544415569) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 467458248 + ... + 467458261.

It is an arithmetic number, because the mean of its divisors is an integer number (1869833020).

Almost surely, 2^6544415563 is an apocalyptic number.

6544415563 is a deficient number, since it is larger than the sum of its proper divisors (934916517).

6544415563 is an equidigital number, since it uses as much as digits as its factorization.

6544415563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934916516.

The product of its digits is 864000, while the sum is 43.

The square root of 6544415563 is about 80897.5621573357. The cubic root of 6544415563 is about 1870.4967426951.

The spelling of 6544415563 in words is "six billion, five hundred forty-four million, four hundred fifteen thousand, five hundred sixty-three".