6504778443 has 8 divisors (see below), whose sum is σ = 8749790928. Its totient is φ = 4298142464.

The previous prime is 6504778433. The next prime is 6504778477. The reversal of 6504778443 is 3448774056.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6504778443 - 2¹⁷ = 6504647371 is a prime.

It is a super-3 number, since 3×6504778443³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6504778392 and 6504778401.

It is not an unprimeable number, because it can be changed into a prime (6504778433) 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 7 ways as a sum of consecutive naturals, for example, 9593730 + ... + 9594407.

It is an arithmetic number, because the mean of its divisors is an integer number (1093723866).

Almost surely, 2^6504778443 is an apocalyptic number.

6504778443 is a deficient number, since it is larger than the sum of its proper divisors (2245012485).

6504778443 is a wasteful number, since it uses less digits than its factorization.

6504778443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19188253.

The product of its (nonzero) digits is 2257920, while the sum is 48.

The square root of 6504778443 is about 80652.2066840083. The cubic root of 6504778443 is about 1866.7127892551.

The spelling of 6504778443 in words is "six billion, five hundred four million, seven hundred seventy-eight thousand, four hundred forty-three".