6544559494 has 32 divisors (see below), whose sum is σ = 10990463616. Its totient is φ = 2897099520.

The previous prime is 6544559471. The next prime is 6544559503. The reversal of 6544559494 is 4949554456.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 318294 + ... + 338230.

It is an arithmetic number, because the mean of its divisors is an integer number (343451988).

Almost surely, 2^6544559494 is an apocalyptic number.

6544559494 is a deficient number, since it is larger than the sum of its proper divisors (4445904122).

6544559494 is a wasteful number, since it uses less digits than its factorization.

6544559494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20340.

The product of its digits is 15552000, while the sum is 55.

The square root of 6544559494 is about 80898.4517404381. The cubic root of 6544559494 is about 1870.5104551746.

The spelling of 6544559494 in words is "six billion, five hundred forty-four million, five hundred fifty-nine thousand, four hundred ninety-four".