13378785320 has 32 divisors (see below), whose sum is σ = 31073310720. Its totient is φ = 5178884160.

The previous prime is 13378785311. The next prime is 13378785353. The reversal of 13378785320 is 2358787331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5393432 + ... + 5395911.

It is an arithmetic number, because the mean of its divisors is an integer number (971040960).

Almost surely, 2^13378785320 is an apocalyptic number.

13378785320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13378785320 is an abundant number, since it is smaller than the sum of its proper divisors (17694525400).

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

13378785320 is a wasteful number, since it uses less digits than its factorization.

13378785320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10789385 (or 10789381 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 13378785320 in words is "thirteen billion, three hundred seventy-eight million, seven hundred eighty-five thousand, three hundred twenty".