78874343520 has 576 divisors, whose sum is σ = 297107274240. Its totient is φ = 17531092992.

The previous prime is 78874343519. The next prime is 78874343543. The reversal of 78874343520 is 2534347887.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 156807589 + ... + 156808091.

It is an arithmetic number, because the mean of its divisors is an integer number (515811240).

Almost surely, 2^78874343520 is an apocalyptic number.

78874343520 is a gapful number since it is divisible by the number (70) 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 78874343520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148553637120).

78874343520 is an abundant number, since it is smaller than the sum of its proper divisors (218232930720).

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

78874343520 is a wasteful number, since it uses less digits than its factorization.

78874343520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 78874343520 in words is "seventy-eight billion, eight hundred seventy-four million, three hundred forty-three thousand, five hundred twenty".