78547278220 has 12 divisors (see below), whose sum is σ = 164949284304. Its totient is φ = 31418911280.

The previous prime is 78547278211. The next prime is 78547278221. The reversal of 78547278220 is 2287274587.

It is not an unprimeable number, because it can be changed into a prime (78547278221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1963681936 + ... + 1963681975.

It is an arithmetic number, because the mean of its divisors is an integer number (13745773692).

Almost surely, 2^78547278220 is an apocalyptic number.

It is an amenable number.

78547278220 is an abundant number, since it is smaller than the sum of its proper divisors (86402006084).

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

78547278220 is a wasteful number, since it uses less digits than its factorization.

78547278220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927363920 (or 3927363918 counting only the distinct ones).

The product of its (nonzero) digits is 3512320, while the sum is 52.

The spelling of 78547278220 in words is "seventy-eight billion, five hundred forty-seven million, two hundred seventy-eight thousand, two hundred twenty".