78159820116 has 96 divisors (see below), whose sum is σ = 213687290880. Its totient is φ = 21768595200.

The previous prime is 78159820051. The next prime is 78159820121. The reversal of 78159820116 is 61102895187.

It is a happy number.

It is a super-3 number, since 3×78159820116³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4437415 + ... + 4454993.

It is an arithmetic number, because the mean of its divisors is an integer number (2225909280).

Almost surely, 2^78159820116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78159820116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106843645440).

78159820116 is an abundant number, since it is smaller than the sum of its proper divisors (135527470764).

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

78159820116 is a wasteful number, since it uses less digits than its factorization.

78159820116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18925 (or 18923 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 48.

The spelling of 78159820116 in words is "seventy-eight billion, one hundred fifty-nine million, eight hundred twenty thousand, one hundred sixteen".