78684128352 has 60 divisors (see below), whose sum is σ = 231407843436. Its totient is φ = 26228041920.

The previous prime is 78684128351. The next prime is 78684128381. The reversal of 78684128352 is 25382148687.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78684128351) 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 9 ways as a sum of consecutive naturals, for example, 15175674 + ... + 15180857.

Almost surely, 2^78684128352 is an apocalyptic number.

78684128352 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78684128352 is an abundant number, since it is smaller than the sum of its proper divisors (152723715084).

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

78684128352 is a wasteful number, since it uses less digits than its factorization.

78684128352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30356553 (or 30356536 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 78684128352 in words is "seventy-eight billion, six hundred eighty-four million, one hundred twenty-eight thousand, three hundred fifty-two".