78688404398 has 8 divisors (see below), whose sum is σ = 118035652800. Its totient is φ = 39343186800.

The previous prime is 78688404391. The next prime is 78688404401. The reversal of 78688404398 is 89340488687.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78688404391) 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 3 ways as a sum of consecutive naturals, for example, 406823 + ... + 568226.

It is an arithmetic number, because the mean of its divisors is an integer number (14754456600).

Almost surely, 2^78688404398 is an apocalyptic number.

78688404398 is a deficient number, since it is larger than the sum of its proper divisors (39347248402).

78688404398 is a wasteful number, since it uses less digits than its factorization.

78688404398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015402.

The product of its (nonzero) digits is 74317824, while the sum is 65.

The spelling of 78688404398 in words is "seventy-eight billion, six hundred eighty-eight million, four hundred four thousand, three hundred ninety-eight".