78194827344 has 80 divisors (see below), whose sum is σ = 207552969728. Its totient is φ = 25349469696.

The previous prime is 78194827309. The next prime is 78194827379. The reversal of 78194827344 is 44372849187.

It is an interprime number because it is at equal distance from previous prime (78194827309) and next prime (78194827379).

It is a super-2 number, since 2×78194827344² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4746129 + ... + 4762575.

Almost surely, 2^78194827344 is an apocalyptic number.

78194827344 is a gapful number since it is divisible by the number (74) 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 78194827344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103776484864).

78194827344 is an abundant number, since it is smaller than the sum of its proper divisors (129358142384).

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

78194827344 is a wasteful number, since it uses less digits than its factorization.

78194827344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19172 (or 19166 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 57.

The spelling of 78194827344 in words is "seventy-eight billion, one hundred ninety-four million, eight hundred twenty-seven thousand, three hundred forty-four".