12781831783368 has 96 divisors (see below), whose sum is σ = 32845739189760. Its totient is φ = 4144931239680.

The previous prime is 12781831783327. The next prime is 12781831783403. The reversal of 12781831783368 is 86338713818721.

It is a hoax number, since the sum of its digits (66) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12781831783299 and 12781831783308.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321673230 + ... + 321712962.

It is an arithmetic number, because the mean of its divisors is an integer number (342143116560).

Almost surely, 2^{12781831783368} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12781831783368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16422869594880).

12781831783368 is an abundant number, since it is smaller than the sum of its proper divisors (20063907406392).

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

12781831783368 is a wasteful number, since it uses less digits than its factorization.

12781831783368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49607 (or 49566 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 66.

The spelling of 12781831783368 in words is "twelve trillion, seven hundred eighty-one billion, eight hundred thirty-one million, seven hundred eighty-three thousand, three hundred sixty-eight".