12840268849 has 16 divisors (see below), whose sum is σ = 13266691200. Its totient is φ = 12419568000.

The previous prime is 12840268807. The next prime is 12840268873. The reversal of 12840268849 is 94886204821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12840268849 is a prime.

It is a super-2 number, since 2×12840268849² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12840268796 and 12840268805.

It is not an unprimeable number, because it can be changed into a prime (12840268879) 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, 3853114 + ... + 3856444.

It is an arithmetic number, because the mean of its divisors is an integer number (829168200).

Almost surely, 2^12840268849 is an apocalyptic number.

It is an amenable number.

12840268849 is a deficient number, since it is larger than the sum of its proper divisors (426422351).

12840268849 is a wasteful number, since it uses less digits than its factorization.

12840268849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152.

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 12840268849 in words is "twelve billion, eight hundred forty million, two hundred sixty-eight thousand, eight hundred forty-nine".