2781933984009 has 24 divisors (see below), whose sum is σ = 4189380212160. Its totient is φ = 1777312791072.

The previous prime is 2781933983989. The next prime is 2781933984097. The reversal of 2781933984009 is 9004893391872.

2781933984009 is a `hidden beast` number, since 2 + 7 + 8 + 193 + 39 + 8 + 400 + 9 = 666.

2781933984009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2781933984009 - 2⁸ = 2781933983753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2781933984209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67795149 + ... + 67836170.

It is an arithmetic number, because the mean of its divisors is an integer number (174557508840).

Almost surely, 2^{2781933984009} is an apocalyptic number.

It is an amenable number.

2781933984009 is a deficient number, since it is larger than the sum of its proper divisors (1407446228151).

2781933984009 is a wasteful number, since it uses less digits than its factorization.

2781933984009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135631421 (or 135631418 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 2781933984009 in words is "two trillion, seven hundred eighty-one billion, nine hundred thirty-three million, nine hundred eighty-four thousand, nine".