78218845843788 has 144 divisors (see below), whose sum is σ = 215960967069120. Its totient is φ = 23724995033088.

The previous prime is 78218845843769. The next prime is 78218845843829. The reversal of 78218845843788 is 88734854881287.

78218845843788 is a `hidden beast` number, since 7 + 8 + 2 + 1 + 88 + 458 + 4 + 3 + 7 + 88 = 666.

It is a super-2 number, since 2×78218845843788² (a number of 29 digits) contains 22 as substring.

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 47 ways as a sum of consecutive naturals, for example, 63584920 + ... + 64803392.

It is an arithmetic number, because the mean of its divisors is an integer number (1499728937980).

Almost surely, 2^{78218845843788} is an apocalyptic number.

78218845843788 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78218845843788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107980483534560).

78218845843788 is an abundant number, since it is smaller than the sum of its proper divisors (137742121225332).

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

78218845843788 is a wasteful number, since it uses less digits than its factorization.

78218845843788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220448 (or 1220443 counting only the distinct ones).

The product of its digits is 6165626880, while the sum is 81.

The spelling of 78218845843788 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred forty-five million, eight hundred forty-three thousand, seven hundred eighty-eight".