12651377779 has 8 divisors (see below), whose sum is σ = 12671460000. Its totient is φ = 12631312512.

The previous prime is 12651377777. The next prime is 12651377789. The reversal of 12651377779 is 97777315621.

12651377779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12651377779 - 2¹ = 12651377777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12651377771) 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 7 ways as a sum of consecutive naturals, for example, 2569482 + ... + 2574400.

It is an arithmetic number, because the mean of its divisors is an integer number (1583932500).

Almost surely, 2^12651377779 is an apocalyptic number.

12651377779 is a deficient number, since it is larger than the sum of its proper divisors (20082221).

12651377779 is a wasteful number, since it uses less digits than its factorization.

12651377779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8477.

The product of its digits is 3889620, while the sum is 55.

The spelling of 12651377779 in words is "twelve billion, six hundred fifty-one million, three hundred seventy-seven thousand, seven hundred seventy-nine".