12753777779 has 4 divisors (see below), whose sum is σ = 12767840184. Its totient is φ = 12739715376.

The previous prime is 12753777767. The next prime is 12753777781. The reversal of 12753777779 is 97777735721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12753777779 - 2³² = 8458810483 is a prime.

It is a super-3 number, since 3×12753777779³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12753777739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7029842 + ... + 7031655.

It is an arithmetic number, because the mean of its divisors is an integer number (3191960046).

Almost surely, 2^12753777779 is an apocalyptic number.

12753777779 is a deficient number, since it is larger than the sum of its proper divisors (14062405).

12753777779 is an equidigital number, since it uses as much as digits as its factorization.

12753777779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062404.

The product of its digits is 31765230, while the sum is 62.

The spelling of 12753777779 in words is "twelve billion, seven hundred fifty-three million, seven hundred seventy-seven thousand, seven hundred seventy-nine".