12711886009 has 9 divisors (see below), whose sum is σ = 13138787151. Its totient is φ = 12298442760.

The previous prime is 12711885997. The next prime is 12711886021. The reversal of 12711886009 is 90068811721.

It is a happy number.

The square root of 12711886009 is 112747.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (12711885997) and next prime (12711886021).

It can be written as a sum of positive squares in only one way, i.e., 340218025 + 12371667984 = 18445^2 + 111228^2 .

It is not a de Polignac number, because 12711886009 - 2²¹ = 12709788857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12711887009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3493339 + ... + 3496975.

It is an arithmetic number, because the mean of its divisors is an integer number (1459865239).

Almost surely, 2^12711886009 is an apocalyptic number.

12711886009 is the 112747-th square number.

12711886009 is the 56374-th centered octagonal number.

It is an amenable number.

12711886009 is a deficient number, since it is larger than the sum of its proper divisors (426901142).

12711886009 is an frugal number, since it uses more digits than its factorization.

12711886009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 43.

The spelling of 12711886009 in words is "twelve billion, seven hundred eleven million, eight hundred eighty-six thousand, nine".