12771565539 has 16 divisors (see below), whose sum is σ = 17861104128. Its totient is φ = 8107994592.

The previous prime is 12771565487. The next prime is 12771565549. The reversal of 12771565539 is 93556517721.

It is not a de Polignac number, because 12771565539 - 2⁸ = 12771565283 is a prime.

It is a super-2 number, since 2×12771565539² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12771565491 and 12771565500.

It is not an unprimeable number, because it can be changed into a prime (12771565549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218817 + ... + 1229250.

It is an arithmetic number, because the mean of its divisors is an integer number (1116319008).

Almost surely, 2^12771565539 is an apocalyptic number.

12771565539 is a deficient number, since it is larger than the sum of its proper divisors (5089538589).

12771565539 is a wasteful number, since it uses less digits than its factorization.

12771565539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448154.

The product of its digits is 1984500, while the sum is 51.

The spelling of 12771565539 in words is "twelve billion, seven hundred seventy-one million, five hundred sixty-five thousand, five hundred thirty-nine".