12784017849 has 16 divisors (see below), whose sum is σ = 17802778752. Its totient is φ = 8144647808.

The previous prime is 12784017847. The next prime is 12784017859. The reversal of 12784017849 is 94871048721.

It is a cyclic number.

It is not a de Polignac number, because 12784017849 - 2¹ = 12784017847 is a prime.

It is a super-2 number, since 2×12784017849² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12784017847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8754 + ... + 160139.

It is an arithmetic number, because the mean of its divisors is an integer number (1112673672).

Almost surely, 2^12784017849 is an apocalyptic number.

It is an amenable number.

12784017849 is a deficient number, since it is larger than the sum of its proper divisors (5018760903).

12784017849 is a wasteful number, since it uses less digits than its factorization.

12784017849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170016.

The product of its (nonzero) digits is 903168, while the sum is 51.

The spelling of 12784017849 in words is "twelve billion, seven hundred eighty-four million, seventeen thousand, eight hundred forty-nine".