3218978638849 has 8 divisors (see below), whose sum is σ = 3224829947328. Its totient is φ = 3213132337200.

The previous prime is 3218978638819. The next prime is 3218978638907. The reversal of 3218978638849 is 9488368798123.

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 3218978638849 - 2²³ = 3218970250241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3218978638819) 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, 36499 + ... + 2537575.

It is an arithmetic number, because the mean of its divisors is an integer number (403103743416).

Almost surely, 2^{3218978638849} is an apocalyptic number.

It is an amenable number.

3218978638849 is a deficient number, since it is larger than the sum of its proper divisors (5851308479).

3218978638849 is a wasteful number, since it uses less digits than its factorization.

3218978638849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503415.

The product of its digits is 1003290624, while the sum is 76.

The spelling of 3218978638849 in words is "three trillion, two hundred eighteen billion, nine hundred seventy-eight million, six hundred thirty-eight thousand, eight hundred forty-nine".