12781831783380 has 48 divisors (see below), whose sum is σ = 39042686176704. Its totient is φ = 3098625886720.

The previous prime is 12781831783327. The next prime is 12781831783403. The reversal of 12781831783380 is 8338713818721.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9683205237 + ... + 9683206556.

It is an arithmetic number, because the mean of its divisors is an integer number (813389295348).

Almost surely, 2^{12781831783380} is an apocalyptic number.

12781831783380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12781831783380 is an abundant number, since it is smaller than the sum of its proper divisors (26260854393324).

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

12781831783380 is a wasteful number, since it uses less digits than its factorization.

12781831783380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19366411816 (or 19366411814 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 12781831783380 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred thirty-one million, seven hundred eighty-three thousand, three hundred eighty".