12781852384 has 24 divisors (see below), whose sum is σ = 28759168368. Its totient is φ = 5477936640.

The previous prime is 12781852381. The next prime is 12781852403. The reversal of 12781852384 is 48325818721.

It is a happy number.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12781852381) 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, 28530697 + ... + 28531144.

It is an arithmetic number, because the mean of its divisors is an integer number (1198298682).

Almost surely, 2^12781852384 is an apocalyptic number.

12781852384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12781852384 is an abundant number, since it is smaller than the sum of its proper divisors (15977315984).

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

12781852384 is an equidigital number, since it uses as much as digits as its factorization.

12781852384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57061858 (or 57061850 counting only the distinct ones).

The product of its digits is 860160, while the sum is 49.

The spelling of 12781852384 in words is "twelve billion, seven hundred eighty-one million, eight hundred fifty-two thousand, three hundred eighty-four".