6544645118 has 16 divisors (see below), whose sum is σ = 10838451456. Its totient is φ = 2938996440.

The previous prime is 6544645117. The next prime is 6544645127. The reversal of 6544645118 is 8115464456.

It is a happy number.

It is a super-2 number, since 2×6544645118² = 85664759441122467848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544645117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1790246 + ... + 1793897.

It is an arithmetic number, because the mean of its divisors is an integer number (677403216).

Almost surely, 2^6544645118 is an apocalyptic number.

6544645118 is a deficient number, since it is larger than the sum of its proper divisors (4293806338).

6544645118 is a wasteful number, since it uses less digits than its factorization.

6544645118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584239.

The product of its digits is 460800, while the sum is 44.

The square root of 6544645118 is about 80898.9809453741. The cubic root of 6544645118 is about 1870.5186125807.

The spelling of 6544645118 in words is "six billion, five hundred forty-four million, six hundred forty-five thousand, one hundred eighteen".