78368931420 has 96 divisors (see below), whose sum is σ = 236507335680. Its totient is φ = 19274906880.

The previous prime is 78368931383. The next prime is 78368931451. The reversal of 78368931420 is 2413986387.

It is a super-2 number, since 2×78368931420² (a number of 23 digits) contains 22 as substring.

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, 919371 + ... + 1000989.

It is an arithmetic number, because the mean of its divisors is an integer number (2463618080).

Almost surely, 2^78368931420 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 78368931420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118253667840).

78368931420 is an abundant number, since it is smaller than the sum of its proper divisors (158138404260).

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

78368931420 is a wasteful number, since it uses less digits than its factorization.

78368931420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82875 (or 82873 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 78368931420 in words is "seventy-eight billion, three hundred sixty-eight million, nine hundred thirty-one thousand, four hundred twenty".