78328276278 has 64 divisors (see below), whose sum is σ = 181609213440. Its totient is φ = 22058272512.

The previous prime is 78328276249. The next prime is 78328276309. The reversal of 78328276278 is 87267282387.

It is a super-2 number, since 2×78328276278² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5109501 + ... + 5124807.

It is an arithmetic number, because the mean of its divisors is an integer number (2837643960).

Almost surely, 2^78328276278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78328276278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90804606720).

78328276278 is an abundant number, since it is smaller than the sum of its proper divisors (103280937162).

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

78328276278 is a wasteful number, since it uses less digits than its factorization.

78328276278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17061.

The product of its digits is 25288704, while the sum is 60.

The spelling of 78328276278 in words is "seventy-eight billion, three hundred twenty-eight million, two hundred seventy-six thousand, two hundred seventy-eight".