12860355749 has 4 divisors (see below), whose sum is σ = 12860657580. Its totient is φ = 12860053920.

The previous prime is 12860355679. The next prime is 12860355799. The reversal of 12860355749 is 94755306821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8874958849 + 3985396900 = 94207^2 + 63130^2 .

It is a cyclic number.

It is not a de Polignac number, because 12860355749 - 2¹⁶ = 12860290213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12860355697 and 12860355706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12860355799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73904 + ... + 176585.

It is an arithmetic number, because the mean of its divisors is an integer number (3215164395).

It is a 1-persistent number, because it is pandigital, but 2⋅12860355749 = 25720711498 is not.

Almost surely, 2^12860355749 is an apocalyptic number.

It is an amenable number.

12860355749 is a deficient number, since it is larger than the sum of its proper divisors (301831).

12860355749 is an equidigital number, since it uses as much as digits as its factorization.

12860355749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301830.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 12860355749 in words is "twelve billion, eight hundred sixty million, three hundred fifty-five thousand, seven hundred forty-nine".