78821752404246 has 64 divisors (see below), whose sum is σ = 175791897216000. Its totient is φ = 23414877467136.

The previous prime is 78821752404209. The next prime is 78821752404251. The reversal of 78821752404246 is 64240425712887.

It is a self number, because there is not a number n which added to its sum of digits gives 78821752404246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6656830 + ... + 14211153.

It is an arithmetic number, because the mean of its divisors is an integer number (2746748394000).

Almost surely, 2^{78821752404246} is an apocalyptic number.

78821752404246 is an abundant number, since it is smaller than the sum of its proper divisors (96970144811754).

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

78821752404246 is a wasteful number, since it uses less digits than its factorization.

78821752404246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20869973.

The product of its (nonzero) digits is 48168960, while the sum is 60.

The spelling of 78821752404246 in words is "seventy-eight trillion, eight hundred twenty-one billion, seven hundred fifty-two million, four hundred four thousand, two hundred forty-six".