12780724733 has 24 divisors (see below), whose sum is σ = 15557333760. Its totient is φ = 10456205760.

The previous prime is 12780724717. The next prime is 12780724757. The reversal of 12780724733 is 33742708721.

It is not a de Polignac number, because 12780724733 - 2⁴ = 12780724717 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780724783) 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, 53258 + ... + 168516.

It is an arithmetic number, because the mean of its divisors is an integer number (648222240).

Almost surely, 2^12780724733 is an apocalyptic number.

It is an amenable number.

12780724733 is a deficient number, since it is larger than the sum of its proper divisors (2776609027).

12780724733 is a wasteful number, since it uses less digits than its factorization.

12780724733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115377 (or 115370 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 44.

The spelling of 12780724733 in words is "twelve billion, seven hundred eighty million, seven hundred twenty-four thousand, seven hundred thirty-three".