6559493778 has 32 divisors (see below), whose sum is σ = 14710396800. Its totient is φ = 2166436368.

The previous prime is 6559493761. The next prime is 6559493779. The reversal of 6559493778 is 8773949556.

6559493778 is a `hidden beast` number, since 6 + 5 + 594 + 9 + 37 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (6559493779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551326 + ... + 563097.

It is an arithmetic number, because the mean of its divisors is an integer number (459699900).

Almost surely, 2^6559493778 is an apocalyptic number.

6559493778 is an abundant number, since it is smaller than the sum of its proper divisors (8150903022).

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

6559493778 is a wasteful number, since it uses less digits than its factorization.

6559493778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114543 (or 1114537 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The square root of 6559493778 is about 80990.7017996511. The cubic root of 6559493778 is about 1871.9321710713.

The spelling of 6559493778 in words is "six billion, five hundred fifty-nine million, four hundred ninety-three thousand, seven hundred seventy-eight".