12755329861 has 4 divisors (see below), whose sum is σ = 12776344192. Its totient is φ = 12734315532.

The previous prime is 12755329841. The next prime is 12755329889. The reversal of 12755329861 is 16892355721.

12755329861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16892355721 = 139 ⋅121527739.

It is a cyclic number.

It is not a de Polignac number, because 12755329861 - 2¹¹ = 12755327813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12755329841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10506255 + ... + 10507468.

It is an arithmetic number, because the mean of its divisors is an integer number (3194086048).

Almost surely, 2^12755329861 is an apocalyptic number.

It is an amenable number.

12755329861 is a deficient number, since it is larger than the sum of its proper divisors (21014331).

12755329861 is an equidigital number, since it uses as much as digits as its factorization.

12755329861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21014330.

The product of its digits is 907200, while the sum is 49.

The spelling of 12755329861 in words is "twelve billion, seven hundred fifty-five million, three hundred twenty-nine thousand, eight hundred sixty-one".