12776252749 has 4 divisors (see below), whose sum is σ = 13759041436. Its totient is φ = 11793464064.

The previous prime is 12776252747. The next prime is 12776252759. The reversal of 12776252749 is 94725267721.

12776252749 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2248466724 + 10527786025 = 47418^2 + 102605^2 .

It is a cyclic number.

It is not a de Polignac number, because 12776252749 - 2¹ = 12776252747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12776252696 and 12776252705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12776252747) 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, 491394324 + ... + 491394349.

It is an arithmetic number, because the mean of its divisors is an integer number (3439760359).

Almost surely, 2^12776252749 is an apocalyptic number.

It is an amenable number.

12776252749 is a deficient number, since it is larger than the sum of its proper divisors (982788687).

12776252749 is an equidigital number, since it uses as much as digits as its factorization.

12776252749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982788686.

The product of its digits is 2963520, while the sum is 52.

The spelling of 12776252749 in words is "twelve billion, seven hundred seventy-six million, two hundred fifty-two thousand, seven hundred forty-nine".