78489938338 has 16 divisors (see below), whose sum is σ = 134562519360. Its totient is φ = 33636460176.

The previous prime is 78489938333. The next prime is 78489938347. The reversal of 78489938338 is 83383998487.

It is not an unprimeable number, because it can be changed into a prime (78489938333) 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, 72228 + ... + 402736.

It is an arithmetic number, because the mean of its divisors is an integer number (8410157460).

Almost surely, 2^78489938338 is an apocalyptic number.

78489938338 is a deficient number, since it is larger than the sum of its proper divisors (56072581022).

78489938338 is a wasteful number, since it uses less digits than its factorization.

78489938338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347481.

The product of its digits is 250822656, while the sum is 70.

The spelling of 78489938338 in words is "seventy-eight billion, four hundred eighty-nine million, nine hundred thirty-eight thousand, three hundred thirty-eight".