6493909338 has 144 divisors (see below), whose sum is σ = 17286048000. Its totient is φ = 1751912064.

The previous prime is 6493909333. The next prime is 6493909351. The reversal of 6493909338 is 8339093946.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6493909333) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 8026678 + ... + 8027486.

It is an arithmetic number, because the mean of its divisors is an integer number (120042000).

Almost surely, 2^6493909338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6493909338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8643024000).

6493909338 is an abundant number, since it is smaller than the sum of its proper divisors (10792138662).

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

6493909338 is a wasteful number, since it uses less digits than its factorization.

6493909338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1319 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 54.

The square root of 6493909338 is about 80584.7959481191. The cubic root of 6493909338 is about 1865.6724869170.

The spelling of 6493909338 in words is "six billion, four hundred ninety-three million, nine hundred nine thousand, three hundred thirty-eight".