12756212165 has 16 divisors (see below), whose sum is σ = 16346119680. Its totient is φ = 9535229760.

The previous prime is 12756212113. The next prime is 12756212173. The reversal of 12756212165 is 56121265721.

12756212165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12756212165 - 2²⁴ = 12739434949 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1414439 + ... + 1423428.

It is an arithmetic number, because the mean of its divisors is an integer number (1021632480).

Almost surely, 2^12756212165 is an apocalyptic number.

It is an amenable number.

12756212165 is a deficient number, since it is larger than the sum of its proper divisors (3589907515).

12756212165 is a wasteful number, since it uses less digits than its factorization.

12756212165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837932.

The product of its digits is 50400, while the sum is 38.

Adding to 12756212165 its reverse (56121265721), we get a palindrome (68877477886).

The spelling of 12756212165 in words is "twelve billion, seven hundred fifty-six million, two hundred twelve thousand, one hundred sixty-five".