12956850009 has 12 divisors (see below), whose sum is σ = 18752225700. Its totient is φ = 8620926624.

The previous prime is 12956849929. The next prime is 12956850013. The reversal of 12956850009 is 90005865921.

It can be written as a sum of positive squares in 2 ways, for example, as 7185105225 + 5771744784 = 84765^2 + 75972^2 .

It is not a de Polignac number, because 12956850009 - 2²¹ = 12954752857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12956850019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1409614 + ... + 1418775.

It is an arithmetic number, because the mean of its divisors is an integer number (1562685475).

Almost surely, 2^12956850009 is an apocalyptic number.

It is an amenable number.

12956850009 is a deficient number, since it is larger than the sum of its proper divisors (5795375691).

12956850009 is a wasteful number, since it uses less digits than its factorization.

12956850009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828904 (or 2828901 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 12956850009 in words is "twelve billion, nine hundred fifty-six million, eight hundred fifty thousand, nine".