78334789845378 has 128 divisors (see below), whose sum is σ = 181314272240640. Its totient is φ = 22298496030720.

The previous prime is 78334789845343. The next prime is 78334789845383. The reversal of 78334789845378 is 87354898743387.

It is a super-2 number, since 2×78334789845378² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78334789845378.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1934984325 + ... + 1935024807.

It is an arithmetic number, because the mean of its divisors is an integer number (1416517751880).

Almost surely, 2^{78334789845378} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78334789845378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90657136120320).

78334789845378 is an abundant number, since it is smaller than the sum of its proper divisors (102979482395262).

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

78334789845378 is a wasteful number, since it uses less digits than its factorization.

78334789845378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43792.

The product of its digits is 27311800320, while the sum is 84.

The spelling of 78334789845378 in words is "seventy-eight trillion, three hundred thirty-four billion, seven hundred eighty-nine million, eight hundred forty-five thousand, three hundred seventy-eight".