12771265529 has 6 divisors (see below), whose sum is σ = 14037837450. Its totient is φ = 11610241280.

The previous prime is 12771265513. The next prime is 12771265553. The reversal of 12771265529 is 92556217721.

It can be written as a sum of positive squares in only one way, i.e., 10828483600 + 1942781929 = 104060^2 + 44077^2 .

It is not a de Polignac number, because 12771265529 - 2⁴ = 12771265513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12771267529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52773704 + ... + 52773945.

It is an arithmetic number, because the mean of its divisors is an integer number (2339639575).

Almost surely, 2^12771265529 is an apocalyptic number.

It is an amenable number.

12771265529 is a deficient number, since it is larger than the sum of its proper divisors (1266571921).

12771265529 is a wasteful number, since it uses less digits than its factorization.

12771265529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105547671 (or 105547660 counting only the distinct ones).

The product of its digits is 529200, while the sum is 47.

The spelling of 12771265529 in words is "twelve billion, seven hundred seventy-one million, two hundred sixty-five thousand, five hundred twenty-nine".