12773986961 has 4 divisors (see below), whose sum is σ = 13214469300. Its totient is φ = 12333504624.

The previous prime is 12773986921. The next prime is 12773986987. The reversal of 12773986961 is 16968937721.

12773986961 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 9183580561 + 3590406400 = 95831^2 + 59920^2 .

It is a cyclic number.

It is not a de Polignac number, because 12773986961 - 2²² = 12769792657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12773986961.

It is not an unprimeable number, because it can be changed into a prime (12773986921) 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, 220241126 + ... + 220241183.

It is an arithmetic number, because the mean of its divisors is an integer number (3303617325).

Almost surely, 2^12773986961 is an apocalyptic number.

It is an amenable number.

12773986961 is a deficient number, since it is larger than the sum of its proper divisors (440482339).

12773986961 is an equidigital number, since it uses as much as digits as its factorization.

12773986961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440482338.

The product of its digits is 6858432, while the sum is 59.

The spelling of 12773986961 in words is "twelve billion, seven hundred seventy-three million, nine hundred eighty-six thousand, nine hundred sixty-one".