12771779253 has 4 divisors (see below), whose sum is σ = 17029039008. Its totient is φ = 8514519500.

The previous prime is 12771779243. The next prime is 12771779269. The reversal of 12771779253 is 35297717721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12771779253 - 2⁵ = 12771779221 is a prime.

It is a super-2 number, since 2×12771779253² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12771779196 and 12771779205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12771779213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128629873 + ... + 2128629878.

It is an arithmetic number, because the mean of its divisors is an integer number (4257259752).

Almost surely, 2^12771779253 is an apocalyptic number.

It is an amenable number.

12771779253 is a deficient number, since it is larger than the sum of its proper divisors (4257259755).

12771779253 is an equidigital number, since it uses as much as digits as its factorization.

12771779253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4257259754.

The product of its digits is 1296540, while the sum is 51.

The spelling of 12771779253 in words is "twelve billion, seven hundred seventy-one million, seven hundred seventy-nine thousand, two hundred fifty-three".